The term 'Buckwheat Bowlful' is a combination of two crossword solutions: KASHA (5 letters) and BOWLFUL (8 letters). Kasha is a traditional Eastern European dish made from buckwheat groats, which are hulled grains of the buckwheat plant. It is often served as a side dish or as a main course, and can be cooked with vegetables, mushrooms, and other ingredients. Bowlful is a measure of volume, usually referring to a large quantity of food or liquid. Therefore, a 'Buckwheat Bowlful' is a large quantity of kasha, or buckwheat groats.