INGREDIENTS
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2 pounds white boiling potatoes, peeled and cut into 3/4-inch pieces
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Kosher salt and freshly ground black pepper
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1/3 cup mayonnaise
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3 tablespoons prepared horseradish
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2 tablespoons Dijon mustard
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1 tablespoon distilled white vinegar
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1/4 teaspoon celery salt
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1/8 teaspoon cayenne
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3 stalks celery, chopped, plus 1 tablespoon chopped leaves
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1 large shallot, finely chopped
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2 tablespoons chopped fresh flat-leaf parsley
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2 hard-boiled eggs, chopped