Slice onions thin or whichever way you like to slice onions.
2. Preheat air fryer to 400F/200C for 2-5 minutes
3. In a large bowl add onions, oil, seasoning, salt and pepper, if desired.
4. Mix them well. I like to use this OXO food basting brush to ensure an even coating with oil and seasoning.
5. Pour onions into your air fryer basket/tray. It is better to cook them directly on the tray/basket, however, you can line the tray with parchment paper or air fryer parchment paper.
6. Spread the onions in the basket so they don’t overlap
7. Airfry mode at 400F/200C for 10 minutes, flipping them halfway or until the desired caramelized look. I lowered the temp to 350F and cooked for an additional 3-5 minutes because I love my onions golden brown and caramelized.