Meatballs freeze and reheat well, which makes them perfect for meal prep. You can either freeze the meatballs raw or cooked. To freeze raw, lay out the uncooked meatballs on a flat plate or tray in the freezer to prevent sticking. Pack away in a freezer bag once frozen and cook from frozen when you are ready to eat. If you’ve already cooked the meatballs, this will last a few days in an airtight container in the fridge. Or some weeks in the freezer. Warm in the air fryer when you’re ready to eat.