9 inch pie crust
1 lb. ground beef
1/2 c. bread crumbs
1/2 tsp. oregano
1/4 c. chopped onion
4 oz. tomato sauce
1 tsp. salt
1/4 tsp. pepper

TOPPING:

8 oz. Cheddar cheese, grated
1/4 c. milk
1 egg, beaten
1/2 tsp. salt
1/2 tsp. dry mustard
3 dashes Worcestershire sauce

Preheat oven to 425 degrees. Brown ground beef and add remaining ingredients. Press into 9 inch pie crust. Mix topping ingredients and pour over pie. Bake 30 minutes. Cool slightly before cutting.