Heat oven to 450°F. Grease rectangular baking dish,13x9x2 inches. Cook sausage and ground beef in 10-inch skillet over medium heat, stirring occasionally, until brown.
Drain; set aside.
Stir Bisquick and water in large bowl until dough forms. Divide dough into 2 parts, 1 part slightly larger.
Roll larger part dough into rectangle, 16x14 inches, on surface dusted with Bisquick. Fold crosswise into thirds.
Place in center of baking dish; unfold. Press on bottom and up sides of dish.
Sprinkle with 1 cup of the cheese; top with 3/4 cup of the pizza sauce, the meat mixture, mushrooms and bell pepper, pizza toppings and 1 1/2 cups of the cheese.
Roll remaining part dough into rectangle, 13x9 inches. Fold crosswise into thirds.
Place on cheese in center of baking dish; unfold. Press bottom and top crust edges together to seal. Make small slits in top crust.
Spread remaining pizza sauce over crust; sprinkle with remaining cheese.
Bake uncovered 22 to 25 minutes or until edges of crust are golden brown.
