1 lb. ground beef or turkey, browned & drained
1/2 c. mayonnaise
3/4 c. milk
3 eggs
2 tbsp. cornstarch
1 1/2 c. Cheddar cheese, grated
1/3 c. onion, finely chopped
2 unbaked pie shells

Combine all ingredients except pie shells. Divide mixture in half and pour into pie shells. Bake at 350 degrees for 30 minutes. Top with sour cream, if desired.