This dish is incredibly flavorful and unbelievably simple. Soy sauce and orange juice permeate the fish, while toasted-sesame oil gives it a nutty accent. Boiling the marinade turns it into a thick glaze.
Oshitashi is a classic Japanese side dish made with various leafy greens. While spinach is the most typical example, in this version, red chard is lightly cooked, drained, and chopped, and then tossed with soy sauce and topped with bonito flakes.