Cook noodles in large quart pan half full of salted boiling water.
Cook hamburger in frying pan until browned, add salt and pepper as desired. Add chopped onion to browned hamburger, cook 5 minutes then drain oil. Add diced tomato, sauce, can of mushrooms and black olives (drained). Cook until boiling, stirring to keep from sticking in pan. Stir the ingredients until well blended. Set aside.
When pasta in pot is done, drain then mix pasta with cream cheese, seasoning mix, oregano, salt and pepper in casserole dish. Cover bottom of pan completely with pasta, cream cheese mixture. Take the meat sauce off the stove and pour over pasta mixture. Top with Polly-O shredded mozzarella cheese.