Indulge in gooey and crispy mozzarella sticks made in your Ninja Air Fryer. Cut mozzarella cheese into sticks, dip them in beaten egg, coat with breadcrumbs, and freeze for 30 minutes. Preheat the air fryer to 375°F and cook the mozzarella sticks for 6-8 minutes until golden brown and oozing with melted cheese. Serve with marinara sauce for a delightful appetizer or snack.