Pizza Pasta Casserole

1 pound hamburger
1 onion, chopped
1 jar Ragu spaghetti sauce
1 can tomato soup
1 teaspoon oregano
1 can mushrooms, drained
1/2 teaspoon garlic salt
1 bag egg noodles, cooked
8 ounces mozzarella cheese, shredded

Heat oven to 350 degrees F.

Brown hamburger with onion. Drain well.

Mix together spaghetti sauce, tomato soup, oregano, mushrooms and garlic salt; add to hamburger and mix in well. Layer half of noodles, half of sauce mixture and half of mozzarella cheese; repeat layering once more. Bake for 30 to 45 minutes or until cheese begins to brown around the edge of casserole.