1 cup sour cream or Creme Fraiche
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 pepper
Place all of the ingredients into a medium mixing bowl and whisk until the mixture is smooth and creamy. Place in the refrigerator for at least 4 hours or overnight to allow flavors to meld. Sauce can be stored in the refrigerator in an airtight container for 2 to 3 weeks.