herbs

Preserving shiso, basil, lemon verbena, and other herbs

maki — Thu, 13 Sep 2007 07:42:40 +0200

Around here it’s already cool enough to declare that summer is over and fall is here. (Actually we had a very cold, wet summer anyway, but nevertheless.) So the summer vegetable plants in my garden are dying off, and I’m in the process of salvaging the tomatoes and eggplants, picking the last zucchini, and eyeing the winter squash to see when they will be ready.

Tender herbs like basil are on their last legs, so I’m picking and preserving those flavors of summer so that they can brighten the dark winter months. Last year I took the lazy option and froze everything, packing the picked leaves in plastic bags and throwing them in our big locker-type freezer. Freezing is okay if you’re too busy to do anything else with your herbs, but not really the optimal way all the time to keep tender herbs in the long run. So this year I’m thinking things through a bit more and considering how I want to use each herb, and preserving them accordingly. Each method is quite easy and really doesn’t take that much time.

Basil

In the summer I like to throw basil leaves into everything from soups to sauces to salads. For that though you do need fresh leaves. Frozen leaves darken and don’t really look nice in a salad. (You can keep a basil plant or two going under growlights in pots for garnishing if you’re determined to have it fresh year round.)

I rarely if ever have basil in anything but savory dishes, so a savory preserving method was the logical choice. After trying various methods I have settled on making a basil puree. This is essentially a pesto without the cheese, garlic and pine nuts.

Basil puree

For every 2 cups of fresh basil leaves (lightly packed into the measuring cup), use 1/2 cup of light olive oil (I prefer a light, relatively flavorless olive oil so that the basil flavor really shines through, but you can use an extra virgin if you prefer.) Be sure to pick the leaves only from the stems. Wash the leaves then pat them dry with kitchen towels.

If you are a purist you will mash the leaves with a mortar and pestle, but I use the food processor. Whiz up the leaves until chopped, and add the oil to make a puree. Add a few drops of lemon juice, and a little salt (1/4 tsp. or so per 2 cups of basil).

I freeze this spread thinly in plastic zip bags. To use, just break or cut off as much as you need. You can turn this into pesto by adding freshly grated Parmesan, crushed or grated garlic, and ground pine nuts. (The easy way of course is to whiz everything together in the food processor.)

For what it’s worth, I had about 16 cups of basil leaves, which turned into about 4 cups of basil puree. The puree keeps the bright flavor of basil very well.

(Basil thoughts: This year I grew a variety of basils, but next year I am going to grow mostly the classic Genovese basil or ‘sweet’ basil, and perhaps just one plant each of the small leaved basil, Thai basil, and lemon basil. The Genovese basil really is the most useful, and also makes the nicest pesto or puree.)

Lemon Verbena

I use lemon verbena mostly in drinks and desserts, so it makes sense to preserve (or conserve…I’m never sure which term is correct for what method) it with sugar. This recipe is from a wonderful book called The Herbfarm Cookbook, but I’ve adjusted it just a bit by reducing the sugar.

For every 2 cups of fresh lemon verbena leaves (lightly packed in the measuring cup), use 1/2 cup to 3/4 cup (or 1 cup as is suggested in the book) sugar. I use natural brown cane sugar, but white sugar is fine of course. Puree in the food processor until it forms a paste. Freeze in the same way as the basil puree. This stuff is wonderful sprinkled onto fruit - especially if you broil the fruit, or used as flavoring in all kinds of dishes. You can also stir in a couple of spoonfuls into boiling water for an instant lemon verbena tea. (Strain out the bits with a tea strainer.)

You can also try drying lemon verbena, but to me drying takes away much of the soul of this wonderful herb.

This method also works pretty well with mint leaves. Jamie Oliver had a recipe for pineapple slices sprinkled with mint sugar in one of his books. It should also work with lemon balm, though I haven’t tried it.

Shiso

Shiso, which I consider to be one of the most essential Japanese herbs, is used mainly in savory dishes. Red shiso leaves are used to make umeboshi (they color the plums and give them a distinct flavor). I don’t make umeboshi since I don’t have access to the plums, but shiso on its own can be enjoyed preserved. This year, I just had one red shiso plant and several green shiso plants, which I used almost every day - as garnish, tempura, in salads and more. (Shiso is a nutrition powerhouse with loads of vitamins, calcium, fiber and so on.)

The traditional way to keep either red or green shiso leaves is to preserve them in salt.

Salted shiso leaves

First, select large, unblemished leaves only. (The alternate name for green shiso leaves is ohba, which literally means ‘large leaves’.) Just wash and dry the leaves carefully, and pack down in a non-reactive container (glass, ceramic, plastic or enamel - not anything metal) sprinkled with salt between each leaf. Leave, well covered, in the refrigerator for at least a few days. The leaves will exude moisture and become a rather dark green (or darker red if you’re using the red leaves).

Don’t mix red and green leaves by the way - the red leaves will discolor the green leaves, turning them into an unattractive muddy brown. Besides, the red leaves have more bitterness and need to be rested a bit more after salting.

The salted leaves can be rinsed off a bit or used as-is. Salted shiso leaves are great onigiri wrappers - use instead of nori, and don’t salt your hands or mold when forming the balls. You can also wrap the leaves around ground pork, chicken or beef patties, or even veggie patties, and pan-fry them to make a crispy, fragrant surface. You can do this with fresh shiso leaves too (actually it’s better with fresh leaves). The leaves can also be shredded and tossed with hot pasta. Since the leaves are salty, adjust the amount of salt overall in the dish.

If you have some shiso seed heads (hojiso) they can also be salted in this manner.

Yukari is a furikake-type powder made from dried salted red shiso leaves.

Another way to preserve shiso is to marinate them in soy sauce with some garlic cloves. I first saw this method on the wonderful Japanese cooking community site Cookpad.

Shiso leaves in garlic soy sauce

Simply cut up some garlic cloves, and place with several shiso leaves in soy sauce. Leave for at least a day; store in the refrigerator.

The leaves don’t last that long in the soy sauce (about a month), though you can make them last a bit longer by quickly blanching the leaves in boiling water beforehand. The soy sauce becomes pleasantly flavored with the shiso and garlic, which makes it great to use in cooking, salad dressings and so on.

Finally, I do pack some of the small leaves in plastic bags and store them in the freezer, to use as garnish for noodles, soups and such. Still, shiso is one of the flavors of summer for me, so I can’t wait to sow some seeds next spring for fresh, green leaves in the warm months.

You can also try sprouting shiso seeds indoors and clipping the seedlings (called mejiso) - this is a rather trendy garnish at the moment. Shiso seeds do take some time to germinate though.

Other herbs: drying, freezing and flavored oils

Parsley, coriander and chives are pretty cheap to buy and much better fresh, so I don’t really bother to preserve them. If you want to though, I think the best way is to chop them all up and store pressed out thinly in plastic bags, which go in the freezer. They stay reasonably green and fragrant this way. Just break off what you need. You can also try freezing them with a little water in ice cube trays, but I find this to be too fiddly - and I never have enough ice cube trays.

Small, tough-leaved herbs such as rosemary, thyme and oregano do a lot better in their dried form than tender-leaved herbs do. I dry some sprigs by putting them in a paper bag with handles and hanging the bag on a door handle. The bag allows air circulation and catches any dropping leaves. When the leaves are completely dry, strip them off the stems and store in airtight containers. But if you live in a mild climate, these tough herbs may survive the winter for you. (Here rosemary does stay sort of green, but the other herbs die down to the ground.) If you have enough light, a pots of these tough perennial herbs may survive the winter on a sunny windowsill or under grow lights.

I’ve often seen decorative dried little bundles of thyme and bay leaves in Provence, tied up with string. If you have the patience this may be worthwhile.

You can make flavored oils with these herbs too, though they seem to fare better when you add garlic to the mix. Just fill a bottle or jar with olive oil, and pack it as full as you can with the herb of your choice plus a few cloves of garlic. Leave for at least a week, preferably longer. Strain, then optionally re-package with a decorative sprig of the same herb in the oil. This makes a very decorative present.

A dozen Japanese herbs and vegetables to grow

maki — Wed, 14 Mar 2007 14:51:32 +0100

I am finally getting around to sowing some seeds for the vegetable garden. I really should have sown some things earlier, but I figure it’s not too late yet.

If you are planning a vegetable garden, or even a few pots on your windowsill, and want to introduce some Japanese flavors, here’s a list of some herbs and vegetables to consider growing, in order of importance and ease of growing in a temperate climate. (That’s one with real winters…at least, before global warming.) The ones marked with an *asterisk can be grown in pots. A couple of my favorite seed sources are listed at the bottom.

(Picture above from svanes’ flickr photostream, since my shiso are still at the seed stage.)

*1. Shiso or perilla

If you can only grow one Japanese vegetable or herb, it should be shiso, or perilla (perilla fructescens). I’ve also seen it labeled “beefsteak plant”, for what reason I know not. Shiso is used at all stages of growth. The seedlings are clipped and used as mejiso, as a fragrant garnish. The fully grown leaves, called oh-ba (big leaves), are used whole or shredded, as wrappings or garnish, as well as in pickles. And the flower buds, called hojiso, are salted and pickled. Onigiri wrapped in salted green shisos leaves are to die for.

The green shiso is the most useful one - the red shiso is usually just used for making umeboshi (pickled plums), and for hojiso. If you have the space growing both is great, but you’ll need more green than red.

Since shiso leaves bruise rather easily, they are pretty expensive even if you can buy them. So, they are really worth growing yourself.

If you are lucky, shiso will self-seed itself. They did for me, but someone else mistook them for stinging nettles and pulled them all up! So, I’m sewing some anew this year.

You might find this in the ornamental seeds section,since the leaves are very attractive.

In terms of growing habits and conditions, it’s quite similar to basil, so if you can grow basil you can probably grow shiso successfully. To keep the plants going keep plucking off any new buds until the weather turns cool, then let them form buds which you can cut off and preserve in salt. The only problem with shiso is that the leaves can get chewed up or get little holes drilled into them by various insects. Otherwise they are quite problem free. They do require lots of sun.

*2. Mitsuba

This is another herb that adds a really Japanese flavor to dishes. It’s primarily used as a garnish, so you just need a little.

There are two kinds of mitsuba sold, but they are the same plant: regular mitsuba, and the kind with long, blanched stems. The latter kind is a pain to grow for the home gardener, but regular mitsuba grown for the leaves is very easy. Succession sowing is required. Mitsuba does pretty well in pots on a windowsill.

*3. Daikon radish sprouts

Called kaiware (which means “split shell), this is something you grow indoors rather than outside. Sew some seeds on a piece of thin washing-up sponge pushed into the bottom of a pot or a waterproof container of some kind, and keep the sponge moist. The seeds should sprout in about 2-3 days. Let them grow straight up if possible, though you can still use them if the stems curl. Used as a garnish and a salad ingredient.

4. Small Japanese turnips

Japanese turnips (kabu) are snow white and tiny compared to Western style turnips. They are very sweet and great in everything from pickles to soup to stews. The green tops can also be cooked. Provided you can prevent the pests from chewing the roots, they are very easy to grow, maturing in 30 days or so.

5. Japanese greens

[Note: this part has been edited to correct some botanical fallacies and confusion!]

There are many easy to grow Japanese greens: Komatsuna, Mizuna, Shungiku, Nanohana, etc. Most are better when grown in cool weather. If you can manage to overwinter komatsuna (botanical name brassica rapa var. peruviridis) and other greens in the spring you’ll get more tender and sweeter leaves. On nanohana (botanical name: brassica rapa var.amplexicaulis), which is rather similar to broccoli rabe or broccoli rapa , you will get some beautiful yellow-green flowers, considered as one of the harbingers of spring.

Beetles and other pests do love to make little holes in the leaves of tender greens, so you need to protect against that - if you don’t mind how it looks, covering them in horticultural fleece is the best way. Note that in Japan, greens (including spinach) are usually allowed to grow to full size rather than picked as ‘baby leaves’ for salads.

*6. Japanese eggplants / aubergines

Japanese eggplants or aubergines are small, black and slim. You can substitute eggplants sold as “Chinese”, which are a bright purple and very slim, but you can’t really substitute large Western style eggplants.

Growing eggplants is rather advanced gardening, especially in cool climates. I have had the best success growing them in large pots in a protected location. They require a rich growing medium, frequent fertilizing and lots and lots of water. If you’re up to it though, they will reward you with tons of gorgeous little eggplants that keep giving and giving.

7. Shishito* chili peppers

Shishito chili peppers are mildly spicy, rather like jalapeño peppers. They’re usually eaten while still green. Very nice as tempura and in many other dishes. If you can grow other kinds of peppers, chili or sweet, then you can grow shishito.

*8. Green onions

You use such a lot of green onions in Japanese cooking that it can be quite worthwhile to grow some in the garden. You need to sow then in succession for a continuous supply. They are quite easy to grow. There are lots of varieties, but I just grow a general “evergreen” type. You can grow these in pots or growing boxes. You can even try planting up the cut off bottoms of store-bought green onions - they will sprout!

9. Kabocha, or Japanese squash

You need lots and lots of space to grow squash. Japanese squash, or kabocha, are sweet, dense and decidedly not watery. I’ve had mixed success with kabocha, but when I have gotten some to ripen successfully we’ve spent the rest of the year talking about how good they were.

10. Daikon radish

I find daikon difficult to grow because we have rather stony soil, so the daikon roots often end up splitting in odd ways. Also, you can buy daikon or mouli quite easily in stores, so it may not be worth the effort. But your own are always better, of course, especially since you can also eat the delicious green tops, which most stores in Europe and the U.S. seem to cut off.

11. Gobo or Burdock root

Gobo, or burdock root, is very hard to get a hold of unless you have access to a fairly good sized Japanese grocery. But it’s also very hard to grow. It requires very deep digging to avoid it splitting into multiple thin roots, and it takes a long time to mature. But that earthy, crunchy flavor is an integral part of many Japanese dishes.

12. Japanese cucumbers

Japanese cucumbers are small, very thin and quite seedless. Worth growing if you like to eat lots of raw cucumber in salads and so on. Grow like other cucumbers, ideally on a trellis.

Other vegetables

I’ve had mixed, mostly bad, experiences trying to grow these:

Edamame. The tips tend to get attacked by tiny black beetles, even while bush beans are growing near them happily. I guess they must be very tasty. I may try them again though, because nothing beats really fresh edamame.
Soramame, or broad beans. Also very popular in England. I need to sow these in the fall I think…sowing them in the spring yields rather sickly and poor bearing plants. (Note, I’m not much of a gardener!)

I’d also like to get my hands on some myo-ga root. And if I could grow a real ume tree…

My favorite seed sources

A lot of general seed catalogs, like Thompson and Morgan, Burpee’s, Mr. Fothergills etc. do sell some Japanese vegetable seeds. Thompson and Morgan is my favorite big seed catalog, mainly because they ship worldwide. (The two major Swiss seed companies, Select and Samen Mauser, are good sources for vegetable seeds in general, but they don’t carry any Japanese vegetable seeds. They have great selections of green beans though.)

My favorite Asian seed mail order source by far is Evergreen Seeds in Anaheim, California. I have been buying seeds from them forever, and my mother used to buy seeds from them back in the early ’80s for her garden in Long Island, New York. They ship internationally, which is so rare for a U.S. based company. They carry lots of Asian (as in Chinese/Korean/Thai) seeds besides the Japanese ones.

Kitazawa Seed Company in Oakland, California is another good mailorder source (though their website seems to be broken at the moment). I don’t think they ship outside of the U.S. though.

I’d also like to mention Real Seeds, especially for UK and European gardeners. While they don’t really carry a lot of Japanese vegetable seeds, I just love their whole attitude. They don’t sell any F1 hybrids, just heirloom and open pollinated varieties. They actively encourage you to save your own seeds - unheard of for a seed supplier! Their web site is so fun to read I bought way more seeds from them than I needed.