Kasha (Kahsha) is hulled and roasted buckwheat groats. It can be eaten right out of the bag and is commonly used as a topping for frozen yogurt. Buckwheat (Fagopyrum Esculentum) is not technically a grain but an annual related to rhubarb. Buckwheat is rich in amino acids and considered the "heartiest" grain, although it is not as easy to digest as other grains. Kasha has an earthy, nutty, roasted flavor and crunchy texture. It is native to central Asia and was introduced to Europe at the end of the middle ages. Buckwheat groats have been an important food source, in a variety of forms, since the 10th Century BC.