Discover the whole grain goodness of amaranth, an ancient grain (actually a seed) that was a staple food of the early Aztecs. Gluten free and a source of complete protein, amaranth seed contains all the essential amino acids, including lysine, which is lacking in most grains. It makes a delicious hot cereal or polenta, or you can add this grain's pleasant texture and extra nutrition to baked goods or homemade granola.