Mostaccioli

2 lb. ground chuck
1 lb. onion, chopped
1 stick margarine
2 c. uncooked mostaccioli or penne pasta
1 large can sliced mushroom, drained
15 oz. can Italian style tomato sauce
1 can diced tomato with basil, oregano, and garlic, undrained
1 c. mozzarella cheese, shredded

• Heat oven to 350. Spray 8-inch baking dish with nonstick cooking spray. Cook mostaccioli as directed on package. Drain. In 12" skilletbrown meat over medium-high heat until thoroughly cooked, stirring frequently. Rinse & drain. Stir in tomato sauce, tomatoes and mushrooms. Bring to a boil. Remove from heat; pour into sprayed baking dish. Add cooked pasta. Stir gently to mix. Cover with foil and seal tightly. Bake for 15 minutes. Uncover, sprinkle with cheese. Bake uncovered 5-10 minutes to melt cheese. Serve with salad and bread.