1Move oven rack to lowest position. Heat oven to 450ºF. Grease 12-inch pizza pan. Cook beef in 10-inch skillet over medium heat, stirring occasionally, until brown; drain. Stir in salsa, corn and 1/4 cup water. Heat to boiling; remove from heat.
2Mix Bisquick, 1/3 cup hot water and the oil until soft dough forms; beat vigorously 20 strokes. Let stand 5 minutes. Press dough in pizza pan, using fingers dipped in Bisquick; pinch edge to form 1/2-inch rim. Spread beef mixture over dough. Sprinkle with cheese.
3Bake 11 to 15 minutes or until crust is golden brown and cheese is melted. Arrange Toppings on pizza to form jack-o’-lanterns.