This version of horseradish sauce is excellent with roast pork or grilled chops.
1 1/2 teaspoons prepared horseradish (or more to taste)
1/3 cup mayonnaise
1/3 cup sour cream
1 tablespoon country-style Dijon mustard
1 tablespoon cider vinegar
Coarse kosher salt & freshly ground black pepper, to taste
Whisk the ingredients together in a small mixing bowl until incorporated. Allow the flavors to blend for at least two hours before serving.