First Slice your sweet onions into thick slices. This is about 4-5 slices per onion. Press through the center to seperate each ring. If some rings are too thin, make them thicker by keeping two together.
Next, prepare your eggless chickpea batter by combining the water, chickpea flour, 2 tbsp corn starch, nutritional yeast, salt, paprika, and garlic powder in a medium size bowl. This should create a thick batter, if its too thin you can add another tablespoon of cornstarch.
Grab two additional medium size bowls and put the 1/2 cup of corn starch in one and your panko bread crumbs in the other. Begin coating your onion ring by first dipping the onion in corn starch. Give it a shake to remove any excess.
Next dip your onion ring into the batter and then the panko bread brumbs.
Place your onion rings in the air fryer without over lapping, cooking in batches at 400 degrees for 8-10 minutes.
For gluten-free and low carb you can use almond flour instead of panko bread crumbs.
you can make this same recipe non-vegan by using 2 regular eggs instead of the chickpea, cornstarch, and water