MEAT LOAF PUFF

1 slightly beaten egg
1/2 cup soft bread crumbs
1/2 cup chopped onion
1/2 cup milk
1 1/2 teaspoons salt
1/8 teaspoon pepper
1 1/2 pounds ground beef
1 tomato, sliced
4 slices process American cheese
1 cup dairy sour cream
3/4 cup sifted all-purpose flour
3 egg yolks
1/2 teaspoon salt
Dash popper
3 stiffly-beaten egg whites

Combine first 6 ingredients; add beef and mix well. Press in 8x8x2-inch baking dish

Bake in 350 degree F oven for 25 minutes; drain. Top with tomato and cheese slices.

In small mixer bowl, combine sour cream, flour, egg yolks, and remaining salt and pepper; beat till thick and creamy. Fold in egg whites; pour over cheese slices.

Return to oven for 30 minutes or till golden brown Cool 5 minutes before serving.

Makes 6 to 8 servings
From: Recipelink.com
Source: Recipe magazine insert: 50 All-Time Great Hamburger Recipes, Better Homes and Gardens, not dated