Cut the cauliflower into bite-size florets. Make sure every piece has a flat area for the parmesan crust to adhere to.
Mix the olive oil, salt, pepper, red chili flakes, parsley and parmesan cheese in a bowl.
Spread the parmesan mixture evenly on the bottom of the air fryer basket. Make sure to remove the bottom tray. You want a flat surface for the crust to form.
Place the cauliflower flat side down.
Air fry at 350 degrees for 15 minutes or until the parmesan cheese is melted and brown and develops a nice bottom crust.
Serve warm and enjoy.