1Heat oven to 400°. Generously grease bottom and sides of square pan, 9x9x2 inches, with shortening.
2Stir Bisquick, Parmesan cheese, water, Italian seasoning and pepperoni until moistened; spread on bottom of pan. Sprinkle with mozzarella cheese. Top with olives.
3Bake uncovered 18 to 20 minutes or until edges are light golden and cheese is melted; cool slightly. Serve warm. Serve with pizza sauce.