Upside-Down Pizza
["1 1/2 lb. ground beef", "1 medium onion, chopped", "1 (15 1/2 oz.) can or jar pizza sauce", "1/2 tsp. garlic salt", "1/4 tsp. oregano", "8 oz. Mozzarella, grated", "2 eggs", "1 c. milk", "1 Tbsp. oil", "1/2 tsp. salt", "1 c. flour", "1/2 c. grated Parmesan cheese"]
["Preheat oven to 350\u00b0.", "Brown beef and onion; pour off fat. Blend in pizza sauce, garlic salt and oregano.", "Put mixture in greased 9 x 13-inch pan and sprinkle with Mozzarella."]
["ground beef", "onion", "pizza sauce", "garlic salt", "oregano", "Mozzarella", "eggs", "milk", "oil", "salt", "flour", "Parmesan cheese"]