Heat oven to 400°F. Grease 9-inch round cake pan and hands. Press dough in bottom and all the way up side of pan.
Bake 12 to 14 minutes or until edge is beginning to brown. Meanwhile, in 10-inch nonstick skillet, cook sausage and 1/2 cup of the bell pepper 7 to 9 minutes, stirring frequently, until sausage is no longer pink; drain. Stir in mushrooms and pizza sauce. Keep warm over low heat.
Spread 1/2 cup of the cheese evenly in bottom of partially baked crust. Spoon hot sausage mixture over cheese. Top with remaining 1/2 cup cheese, the tomatoes and remaining 1/4 cup bell pepper.
Bake 8 to 10 minutes longer or until crust is deep golden brown and cheese is melted. Let stand 5 minutes before serving.