Wash the cauliflower, and break into bite sized florets if using a full head of cauliflower, rather than a precut bag of florets.
Add the olive oil, parmesan, and garlic to a large bowl and stir well to mix together.
Add the cauliflower florets, and mix around to coat the cauliflower with the mixture.
Add a single layer to the air fryer basket, and air fry for 14 minutes, shaking the basket once about halfway through cooking.
Remove from air fryer, and serve hot!
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