In a small bowl, mix together cream cheese, miracle whip, and Italian seasoning. Mixture doesn't need to be perfectly smooth but make sure it is thoroughly mixed.
To assemble dish: Line bottom of baking dish with a single layer of cooked garlic bread (as pictured above). Sprinkle on 1 cup of mozzarella cheese on top of the bread, then follow with the cream cheese mixture, spreading it out as much as you can. Cover the cream cheese with pasta sauce and then another layer of mozzarella cheese (also 1 cup). Arrange meatballs (still frozen) on the sauce and then top it all with the remaining mozzarella cheese.
Bake dish, uncovered, for 30 minutes or until cheese has melted and meatballs are hot.