• Preheat the air fryer to 375°F, and cut the puff pastry into 4 squares.
  1 sheet puff pastry
• On one half of each piece, layer 3 to 4 pepperoni slices and about 1 mozzarella string cheese (or a small handful of shredded mozzarella). Sprinkle with Italian seasoning, and keep the filling away from the edges.
  12 to 18 pepperoni slices, 4 to 6 mozzarella string cheeses, Italian seasoning
• Combine the egg and water to make the egg wash.
  1 egg, 1 tablespoon water
• Brush the pastry edges with egg wash, fold the empty half over the filling, and press with a fork to seal. Cut 2 to 3 small slits in the top of each pocket for steam to escape, then brush the tops with more egg wash.
• Place the pockets in a single layer in the air fryer basket. Air fry at 375°F for 9 to 11 minutes, flipping once halfway through, until puffed and deep golden brown.
• Let them rest for 3 to 5 minutes, then serve warm with pizza or marinara sauce for dipping.
  ⅓ to ½ cup pizza sauce

How to Store Leftovers

• Store them in an airtight container in the refrigerator for up to 3 days.