Peel and cut onion into thin round slices.
Drizzle oil over the slices and then gently separate the rings.
Place the onion rings in the air fryer basket. Fry them initially at 300F for 10 min. Gently mix the rings at a 5 min interval.
Now lower the temperature down to 240F and continue heating the rings. After every 5 min gently mix the rings. It will take 15-18 min @240F to get the desired color and texture.
