1Move oven rack to lowest position. Heat oven to 450°F. Grease 12-inch pizza pan.
2Mix Bisquick and very hot water until soft dough forms. Press dough in pizza pan, using fingers dipped in Bisquick; pinch edge to form 1/2-inch rim.
3Bake 10 minutes. Spread pizza sauce over crust. Sprinkle with mozzarella cheese and Italian seasoning. Bake 5 to 7 minutes or until crust is golden brown and cheese is bubbly. Cut American cheese with cookie cutters in Halloween shapes. Place cheese shapes on pizza just before serving.