1Heat oven to 350º. Cook macaroni as directed on package; drain. Cook sausage in skillet, stirring frequently, until no longer pink; drain.
2Mix macaroni, sausage, pasta sauce, olives and mushrooms in 2 1/2-quart casserole.
3Cover and bake about 30 minutes or until hot. Sprinkle with cheese. Let stand about 5 minutes or until cheese is melted.