Heat oven to 425. Spray a 9" x 13" baking pan w/ cooking spray. In lg skillet, over medium heat, cook sausage and turkey until browned.
Stir in mushrooms and red bell pepper. Cook, stirring for 1 min. Unroll 1 pizza dough, press into bottom and 1/2 way up sides of pan. Sprinkle dough w/ 1 cup cheese, top w/ 3/4 cup pizza sauce. Spoon chicken mix over sauce, sprinkle w/ 1 cup cheese.
Unroll 2nd dough and place on top of pizza, press edges together. make 2 slits in top of dough. Bake 15 mins. Pour remaining sauce over crust, sprinkle w/ remaining cheese. bake 10 more mins.