INGREDIENTS
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4 large red potatoes (2 pounds)
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2 medium-size sweet potatoes (1 1/2 pounds)
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1/4 cup butter or margarine
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1/2 cup milk
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1/4 cup sour cream
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1/4 cup freshly grated Parmesan cheese
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1 tablespoon prepared horseradish
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1/4 teaspoon salt
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1/4 teaspoon pepper
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1/4 teaspoon ground cinnamon
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1/8 teaspoon ground nutmeg
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Butter or margarine (optional)