Rice may be the most universal ingredient in the world, serving as a cornerstone of the diet for billions in Asia. However, for much of Chinese history, rice faced a serious competitor, and entire cultures developed around a different cereal grain, one that has since diminished in significance: millet. Millet is a cereal grain that behaves and tastes similarly to rice but has a rounder form. It is often used in porridge, stir-fries, or even fritters.