Move oven rack to lowest position. Heat oven to 450 degrees F. Grease 12-inch pizza pan.
Mix 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.
Bake 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.
ŠT.M. of General Mills, Inc.