Preheat oven to 350 degrees. Brown hamburger, onion, and garlic. Drain well. Add garlic salt and Italian seasoning. Add combined pizza sauce. stir well. Spray a 9x13 inch pan with cooking spray. Sprinkle mozzarella over bottom of it. Spread meat mixture over the cheese. In a large bowl - add eggs, milk, flour, oil, and garlic salt. Pour over meat in pan. Sprinkle Parmesan cheese over batter. Bake 35 minutes.