1 tablespoon horseradish
1 tablespoon spicy brown mustard
1 tablespoon sugar
1/4 teaspoon pepperInstructions
Boil potatoes (leave whole or cut in half if large) with skins on until cooked but still a little firm. Drain and cool. If necessary, cut potatoes into bite-size chunks.
Mix remaining ingredients, add to potatoes, and toss to coat. Refrigerate for one hour or more.