Just remember to cook them in oil on a low-to-moderate heat so they don't burn. Crispy, crunchy on the outside and perfectly tender on the inside, these low-carb onion rings use the unusual combination of coconut flour, Parmesan cheese and garlic powder for a subtle yet surprisingly complementary marriage of tastes.
Combine the coconut flour, parmesan, garlic powder, parsley flakes, cayenne and salt in a shallow bowl. Slice up your onion to a thickness of about 1/2 – 3/4 of an inch and break up the rings until you have a big pile. Add all of the onion rings to the beaten egg and mix thoroughly so they are well coated.
Dust onion rings in dry tempura batter mix; set aside. Combine remaining tempura batter mix with baking powder and table salt in medium bowl; mix in eggs and milk. Dip onion rings into egg mixture, letting excess mixture drip off, and then coat thoroughly with panko.
Cut onion crosswise into ¼-inch thick rings and separate rings. Dust onion rings in dry tempura batter mix; set aside. Combine remaining tempura batter mix with baking powder and table salt in medium bowl; mix in eggs and milk. Dip onion rings into egg mixture, letting excess mixture drip off, and then coat thoroughly with panko.