Sweet Potato Pie - cooking recipe

Ingredients

2 c. cooked mashed sweet potatoes
1/2 c. butter, softened
2 egg yolks
1 c. brown sugar
1/4 tsp. salt
1/2 tsp. cinnamon
1/2 tsp. nutmeg
1/2 tsp. ginger
1/2 c. milk
2 egg whites
1/4 c. sugar
1 (9-inch) pie shell, unbaked

Preparation

Mix the first 8 ingredients together while potatoes are still warm.
Add milk.
Beat egg whites until stiff, gradually adding sugar.
Fold into potato mixture and pour into unbaked pie shell.