Cheddar Beef and Noodle Casserole

1 8 ounce package noodles, cooked & drained
1 1/2 lean pounds ground beef
1 medium onion, chopped
1 15 ounce jar spaghetti sauce
1 10 3/4 ounce can Cheddar cheese soup
1 8 ounce can tomato sauce
1 4 ounce can or jar sliced mushrooms
1/4 teaspoon garlic powder
pepper to taste
2 cups shredded Cheddar cheese

In a large skillet, brown ground beef with chopped onion; drain well.

Stir in spaghetti sauce, soup, tomato sauce, mushrooms, garlic powder, salt and pepper. Simmer for 3 to 4 minutes.

Combine beef mixture with cooked noodles; pour into a 3 quart baking dish.

Cover and bake at 350F for 35 to 40 minutes, or until bubbly. Uncover; sprinkle with cheese, and bake just until cheese is melted.