Stir in mushrooms, peppers and pizza sauce. Spoon into ungreased 3-quart casserole. Stir remaining ingredients until dough forms. Turn into surface coated with baking mix. Knead 10 times.
Place wedges on turkey mixture.
Bake in preheated oven 30 minutes or until crust is golden brown. Cook ground beef in skillet until brown. Heat to boiling, stirring frequently. Boil and stir 1 minute. Keep warm over low heat.