Preheat oven to 350 F. Coat a cookie sheet or baking dish with light brush of olive oil.
Beat egg whites, non-dairy milk, vinegar, rice flour, dill weed, and oil in a bowl until light and foamy.
Add puffed amaranth, nutritional yeast, and salt to a separate bowl and stir to combine.
Add the separated onion rings to egg white mixture and coat well. Drop a few onion rings at a time into the bowl with the amaranth mixture, gently coating the rings with the seasoning.
Spread evenly on a cookie sheet and bake for 35-40 minutes or until crispy.