The soybean is a wonderfully versatile legume that, when processed, takes many forms. They include soybean milk, soy sauce, miso, doenjang and fermented black beans, and ingredients that many vegetarians and vegans depend on for protein, including bean curd, tempeh and natto. This vegan dish uses four soy products: salted yellow bean sauce (which comes in a bottle or jar), light soy sauce, bean curd and tempeh. If you're on a gluten-free diet, substitute tamari for the soy sauce. Many cooks...