Preheat oven to 350ºF. Cook sausage, onion and pepper in large nonstick skillet over medium heat for 8-10 minutes or until lightly browned and no longer pink, stirring frequently to break sausage into small pieces; drain.

Stir in pizza sauce and cook 2 minutes. Pour sausage mixture into a lightly greased 9” square baking dish. Sprinkle with 1 cup cheese; set aside.

Combine topping ingredients with a wire whisk just until large lumps disappear; pour evenly over cheese. Bake 30-35 minutes or until golden brown. Sprinkle with remaining 1/2 cup of cheese; let stand 5 minutes before serving.