Heat oven to 400°F. Spray 13x9-inch pan with cooking spray.
In 12-inch nonstick skillet, cook sausage over medium-high heat 10 to 12 minutes, stirring occasionally and breaking up sausage with spoon, until no longer pink. Drain if necessary. Stir in pizza sauce, mushrooms, mozzarella cheese, bell peppers and olives. Spoon mixture into pan; spread evenly.
Unroll dough. Shape dough to fit over sausage mixture in pan. Brush dough with olive oil. Sprinkle with Italian seasoning and Parmesan cheese. Use sharp knife to make several 1-inch slits in dough.
Bake 25 to 30 minutes or until crust is golden brown.