Heat oven to 425'F. Grease 12" pizza pan or 13x9" pan. Unroll dough and place in greased pan; starting at center press out with hands. Bake at 425'F. for 5-8 minutes or until golden brown. Brown ground beef in medium skillet; drain. Stir in pizza sauce and mushrooms. Spoon hamburger mixture over partially baked crust; sprinkle with cheese. Bake at 425'F. for 10-15 minutes or until deep golden brown.