All hail the mighty broccoli. While it's always available in the produce section, it's one of the few fresh vegetables that haven't been shipped halfway around the world to reach people who live in many parts of the northern hemisphere during the colder months. In the spring we even get very locally grown broccoli and its relatives like romanesco.
Broccoli can be rather boring if it's just served steamed, boiled or, god forbid , raw. (I'm sorry, I don't really get raw broccoli. Raw cauliflower yes, but not raw broccoli.) A way to perk up broccoli without relying on those yummy yet caloric additions like mayonnaise, cheese sauce or garlic-and-olive-oil, is to make aemono or ohitashi with them. Ohitashi is basically vegetables that have been steamed or blanched/boiled served with a sauce that contains soy sauce, often but not always a little dashi stock, and sometimes a bit of sake or mirin and sugar. Aemono uses a similar sauce, with added ingredients like ground up sesame seeds. In this recipe, the sauce contains wasabi, so it's aemono.
As long as you have all the ingredients on hand it's very quick to make, and very tasty. The sinus-clearing qualities of the wasabi are softened by the other ingredients in the sauce, while still giving the broccoli a nice, bright flavor.
It makes a great side dish as part of a Japanese meal, or even a salad. It's also a very nice bento item (you may want to contain the sauce in a paper cup or its own container).