Preheat oven to 450 degrees, line the baking sheet with parchment paper, and coat with oil.
Slice onion circles about 1/2 inch thick and set aside.
In a small bowl, mix milk and tapioca starch and set aside.
In a medium-sized bowl, combine brown rice flour, cornmeal, yeast flakes, paprika, onion powder, garlic powder, and sea salt.
Dip each onion ring into milk then into dry mix and transfer to a baking sheet and repeat until all are coated.
Spray battered onion rings with cooking spray or brush with oil and bake for 15 minutes, being careful they don’t burn.
For best results, brush with oil if you want them to look just like the photo above. Also, you have to eat them right away!