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Sirloin Strip served over Arugula Salad w/ Creamy Horseradish Sauce
For the horseradish sauce: 1 cup sour cream 1/4 cup grated fresh horseradish 1 tablespoon Dijon mustard 1 teaspoon White wine vinegar 1/2 teaspoon kosher salt 1/4 teaspoon freshly ground black pepp…