1 (9 inch) pie shell, baked
1/2 lb. hamburger
1/4 c. butter
1/4 c. onion
1/2 c. mayonnaise
1/2 c. milk
3 eggs, beaten
1 1/2 c. grated sharp cheese
1/2 tsp. salt
1/8 tsp. pepper

Brown meat and onion. Combine all ingredients. Bake at 350 degrees for 40 minutes.