Horseradish Sauce For Roast Beef
["4 Tbsp. grated fresh horseradish", "1 tsp. salt", "1/4 tsp. pepper", "1 1/2 tsp. dry mustard", "2 Tbsp. cider vinegar", "2 Tbsp. heavy cream, whipped"]
["Add salt, pepper, mustard and vinegar to horseradish.", "Mix thoroughly. Fold cream into the ingredients, cover and refrigerate for 3 or more hours."]
["horseradish", "salt", "pepper", "dry mustard", "cider vinegar", "heavy cream"]