Line a rimmed baking sheet with wax paper. Lightly beat the egg in a wide, shallow bowl.

Combine the Italian seasoning, salt, and breadcrumbs in a second wide, shallow bowl.

Dip a mozzarella stick into the beaten egg and coat it completely. Dip the stick into the bowl with the breadcrumbs and coat completely. Transfer to a wax paper-lined rimmed baking sheet and line them up so they are not touching. Freeze for ½ hour minimum, 1 hour maximum.

Pull the mozzarella sticks out of the freezer, dip them into the egg and then the breadcrumb mix, and then freeze them for another ½ hour minimum, 1 hour maximum.

Set your air fryer to 390°F. Spray the air fryer basket and the mozzarella sticks with a nonstick cooking spray.

Air fry the mozzarella sticks (in batches if necessary) for 6 to 8 minutes until the exterior is golden and crispy.

Remove from the fryer, cool just long enough to avoid burning your tongue, and eat immediately!