Form meatballs using about 2 tbsp of meatball mixture per ball.
Spray air crisper basket with cooking spray and place meatballs into air crisper basket in Foodi, in a single layer, not touching. Set Foodi to 'air crisp' at 375 degrees Fahrenheit for 12 minutes. Flip meatballs halfway through for even cooking.
Remove once meatballs reach internal temperature of 165 degrees Fahrenheit, and serve!
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Notes
Depending on the size of your air fryer or Ninja Foodi, you may need to air crisp in multiple batches. Turn on your oven to 200 degrees Fahrenheit to keep the meatballs warm in between batches.
Store any leftovers in an airtight glass container in your refrigerator for up to 3-5 days. Reheat in air fryer at 375 degrees Fahrenheit for 3-5 minutes.