1. Peel the sweet onions and then proceed to cut them into medium-sized wedges, ensuring that the wedges are of similar size to promote even cooking. I have kept 2 layers of onion mostly.
2. In a medium-sized mixing bowl, mix together the buttermilk or milk (if using just milk, add a small amount of white vinegar) along with the eggs. Continuously stir the mixture until it is thoroughly blended and smooth.
3. In a separate medium-sized bowl, thoroughly mix together the all-purpose flour, cornflour, cayenne pepper (adjust to ¼ teaspoon for milder breading or ½ teaspoon for spicier breading), paprika, garlic powder, thyme, salt, and black pepper.
4. Stir the ingredients well to ensure they are evenly combined.
5.  Now coat the onion pieces with the flour, cornflour, and spices mixture.
6. Now with the help of a tong take out the petals on a plate.
7. Now place the coated onion pieces into the buttermilk and egg batter, making sure they are entirely coated.
8. Then again dip them in the flour mixture. If you wish to speed up the process, you can use a slotted spoon to transfer the onions back to the cornflour and flour mixture, allowing any excess liquid to drain off. Note: I have used a tong here and worked individually on each onion petal.
9. Stir the onion pieces well to ensure they are thoroughly coated with the flour mixture.
10. Now with the help of a tong or slotted spoon again dip the onion petal in the egg and buttermilk batter.
11. Now pour the onion petal into the breadcrumb and with the help of a fork coat well from all sides. Prepare all the onion petals and place them on a plate. Keep aside.
12. Now spray or brush olive oil or any cooking oil of your choice on the air fryer tray and I have placed a parchment paper on the tray. You can do the same process in your air fryer basket too.
13. Now place some onion petals on the air fryer tray or basket. Do not overcrowd them.
14. Now apple or spray a generous amount of oil on top of each onion petal.
15. Now air fry for 15 to 20 minutes at 400 degrees F. Note: Mine is a large air fryer oven if using an air fryer basket then maybe 10 to 15 minutes will be enough for the onion petals to be ready. Flip in between to ensure even cooking.
16. Once done take it out carefully with the help of a tong.
17. Delicious air fryer onion petals are ready to be served with a choice of your dip or sauce.

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