Sweet Potato Pie
["2 c. sweet potatoes, cooked and mashed", "1 c. brown sugar, firmly packed", "1/2 tsp. ground cinnamon", "1/2 tsp. nutmeg", "1/2 tsp. ground ginger", "1/2 c. butter, softened", "2 eggs, separated", "1/4 tsp. salt", "1/2 c. milk", "1/4 c. sugar", "1 (9-inch) unbaked pie shell"]
["Mix first 10 ingredients well and pour into unbaked pie shell. Bake at 350\u00b0 for 45 minutes."]
["sweet potatoes", "brown sugar", "ground cinnamon", "nutmeg", "ground ginger", "butter", "eggs", "salt", "milk", "sugar", "shell"]