Sweet Potato Pie - cooking recipe

Ingredients

2 cups mashed, cooked sweet potatoes
1 stick of butter or margarine, softened
2 egg yolks
1 cup brown sugar
1/4 tsp salt
1/2 tsp each of ginger, cinnamon, nutmeg
1/2 cup milk
2 egg whites, beaten stiff with 1/4 cup sugar (white)
1 pastry shell

Preparation

Mix first 6 ingredients.
Add milk.
Fold in beaten whites. Pour into unbaked pie shell.
Bake at 400\u00b0 for 10 minutes.
Reduce heat to 350\u00b0 and bake until firm.
Nutmeg and a little white sugar may be sprinkled on top before baking if desired.