Pizza Casserole

1 1/2 pounds lean ground beef
1/2 cup chopped onion
1/4 cup chopped green olives
1 cup fresh sliced mushrooms (canned if you prefer)
1 teaspoon salt
1/8 teaspoon oregano
1/4 teaspoon pepper
1 (12 ounce) package thin egg noodles
2 (10 ounce) cans pizza sauce
1 (8 ounce) can tomato sauce
1 cup milk
1 cup sliced pepperoni
1 (8 ounce) package (or more) shredded mozzarella cheese

Brown hamburger with onions, olives, mushrooms and spices. Turn into a 4 quart baking dish. Cook noodles as directed and drain.

Combine noodles and the beef mixture with all remaining ingredients except the cheese. Sprinkle cheese over the top. Bake covered at 350 degrees F for 45 minutes, and then bake uncovered for an additional 15 minutes.