01 - Whisk together eggs, milk, salt, pepper, and Italian herbs in a medium bowl until fully combined and smooth.
02 - Add cherry tomatoes, spinach, bell pepper, onion, zucchini, and cheese to the egg mixture. Stir gently to distribute evenly.
03 - Preheat air fryer to 350°F for 3 minutes to ensure even cooking.
04 - Brush a 7-inch round oven-safe pan or cake tin with olive oil to prevent sticking.
05 - Pour egg and vegetable mixture into prepared pan. Place in air fryer basket and cook at 350°F for 12-15 minutes until center is set and top is lightly golden.
06 - Allow frittata to cool for 2 minutes before slicing into wedges. Serve warm.