1 lb. ground beef
1/2 c. chopped onion
1 (16 oz.) can cut green beans, drained
1 (16 oz.) can corn, drained
1 (15 oz.) can tomato sauce
1 c. mushrooms
3 med. potatoes, peeled & quartered (1 lb.)
1 beaten egg
Milk
1/2 c. shredded American cheese

In a large skillet cook ground beef and onion until meat is browned and onion is tender; drain off fat. Stir in beans, corn, tomato sauce, mushrooms, 3/4 teaspoon salt and 1/4 teaspoon pepper. Turn mixture into a 13 x 9 x 2 inch baking dish. Sprinkle cheese over meat mixture.

In a covered pan cook potatoes in boiling salted water, about 20 minutes or just until tender; drain. Mash while hot; stir in egg. Add enough milk to make potatoes fluffy, yet stiff enough to hold its shape. Season with salt and pepper. Spread potatoes evenly over meat mixture. Sprinkle Parmesan cheese over potatoes. Bake, uncovered, in a 350 degree oven for 30 minutes.