8 servings 3 tb Margarine 1/4 ts Cinnamon 1/4 c Sugar 3 lg Sweet potatoes, cooked, mash 1/4 ts Salt 1 c Skim milk 1 Egg yolk 3 Egg whites, beaten stiff 3 tb Lemon juice 1 9-inch unbaked pie shell 1 ts Lemon peel Use about 1 1/2 pounds sweet potatoes. Heat oven to 350 F. Beat together margarine,
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