Amaranth cereal is a nutritious and gluten-free alternative to oatmeal. It is made from amaranth grains, which are small seeds packed with essential nutrients. Amaranth cereal can be cooked similarly to oatmeal by simmering the grains in water or milk until they reach a creamy consistency. You can find amaranth cereal in health food stores, natural food markets, or online retailers that specialize in gluten-free or whole grain products.