Place pizza dough on a greased 14-inch pizza pan. Press dough from center to edge of pan, making edges thicker than the center; set aside.
In small bowl, combine mayonnaise, � cup Italian cheese, � cup Parmesan cheese, 1 teaspoon Italian seasoning and garlic powder. Spread over entire pizza; top with remaining Italian cheese.
Lay tomato slices over cheese; season tomatoes with salt and pepper to taste. Sprinkle entire pizza with remaining 1 teaspoon Italian seasoning and remaining � cup Parmesan cheese.
Bake in a preheated 400�F oven 15-18 minutes or until cheese is melted and golden brown. Remove from oven and cut into appetizer squares.