Amaranth seeds can be popped much like popcorn. The seeds are much smaller than popping corn, and make a delightful crunchy topping. It’s highly nutritious, gluten free, and contains lots of protein. Health food stores carry the seeds. grocerytrekker says they taste a bit like Rice Krispies, but more delicious. In Mexico, they make a popped amaranth treat called “alegrias.” The popped seeds are bound together with a sweet solution, like Rice Krispies treats.
All you need to pop your own amaranth seeds is a heavy pan with a tight-fitting lid. Get the pan very hot, add a few tablespoons of seeds, clap the lid on, and keep shaking the pan until the popping stops. Some will be “duds,” but they’re good to eat too.