Hamburger Casserole - cooking recipe

Ingredients

2 Tbsp. butter
2 sliced onions
1 lb. ground beef
1 c. canned tomato soup
1 1/2 c. canned corn
1 c. mashed potatoes
1 beaten egg yolk

Preparation

Melt butter in pan and saut meat and onion until brown.
Add soup and corn.
Mix thoroughly.
Pour in greased baking dish. Cover with potatoes.
Brush top with egg yolk.
Bake in 450\u00b0 oven until brown.