In a small bowl, mix melted butter, garlic, and Italian seasoning.
Slice bread if needed and brush the outside with the garlic butter mixture.
Place cheese directly onto the inside of the bread.
Add leftover pernil on top of the cheese.
Place sandwich halves in the air fryer and cook at 400°F for 3 minutes, or until golden and crispy.
Mix mayonnaise and ketchup together to make mayo-ketchup.
Spread mayo-ketchup onto the toasted bread.
Add avocado, lettuce, and tomato.
Close the sandwich, slice if desired, and serve warm.