Instructions: For the topping: In a small bowl, combine fat-free sour cream, powdered sugar, lemon peel, lemon juice and vanilla. Cover and chill for several hours before serving.

Divide grapes equally among six stemmed dessert glasses or bowls. Add 2 tablespoons of lemony topping to each dish. Sprinkle each serving with 1/2 tablespoon of chopped walnuts. Serve.

This recipe yields 6 servings.

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