In a large bowl, combine the cream cheese, Parmesan cheese, mayonnaise, garlic, basil, garlic salt and pepper; mix well. Stir in the artichokes and spinach. Transfer to a greased 9-in. pie plate. Sprinkle with mozzarella cheese. Bake, uncovered, at 350° for 20-25 minutes or until bubbly and edges are lightly browned. Serve with crackers.