"Not only do prime rib and horseradish sauce go together, but the pairing is royal...."
INGREDIENTS
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1 cup regular or low-fat sour cream
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1/4 cup prepared (white) horseradish
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1 tablespoon Dijon-style mustard
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1 teaspoon white wine vinegar
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1/2 teaspoon kosher salt
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1/4 teaspoon ground white pepper
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Dash Worcestershire sauce
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Dash Tabasco sauce (optional)