8 oz. cooked spaghetti
1 lb. hamburger
1 tsp. Worcestershire sauce
1/2 c. onion
dash of garlic powder
1 tsp. salt
1/8 tsp. pepper
1/2 tsp. oregano
1 large can mushrooms with liquid
1 (15 oz.) can tomato sauce
12 oz. Mozzarella cheese

Brown hamburger with onion; drain and mix with other ingredients. Sprinkle with Parmesan cheese.

Bake at 350°F for 30 minutes. Use 9 x 13-inch dish.

You can also use prepared spaghetti sauce for convenience, if desired.