1 1/2 lbs. ground beef
1/2 c. bread crumbs
1 egg, slightly beaten
1 tsp. minced onion
3/4 tsp. salt
1/2 tsp. oregano
1 (15 oz.) can tomato sauce
1 1/2 c. shredded Mozzarella cheese
1 (4 oz.) can mushrooms

Grease an 8x12x2 inch pan, set aside.

Combine beef, bread crumbs, egg, onion, salt and oregano in mixing bowl; stir in 3/4 cup tomato sauce. Cut a piece of waxed paper 15 inches long. Press meat into a 9x13 inch rectangle on the waxed paper. Sprinkle meat with cheese and top with mushrooms.

Starting with the narrow end of meat, lift waxed paper to help roll meat jelly roll fashion; place meat, seam side down in pan. Bake at 375 degrees for 30 minutes. Remove drippings from pan, pour remaining tomato sauce over meat loaf and bake 30 minutes longer.