1 . Heat oven to 400°F. Spray 9-inch glass pie plate with cooking spray. Heat 10-inch nonstick skillet over medium-high heat. Cook sausage and bell pepper in skillet 7 to 9 minutes, stirring frequently, until sausage is no longer pink. Stir in mushrooms and pizza sauce. Keep warm over low heat.
2 . Unroll dough in pie plate. Press in bottom and up side of plate, folding edge under to form crust. Sprinkle 1/2 cup of the cheese evenly in bottom of crust. Spoon hot sausage mixture over cheese. Top with remaining 1 cup cheese, the tomatoes and olives.
3 . Bake 15 to 20 minutes or until crust is golden brown. Sprinkle with onions. Let stand 5 minutes. To serve, cut pizza into wedges with serrated knife.