INGREDIENTS
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3 pounds small red potatoes
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Kosher salt
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1 cup good mayonnaise
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1/4 cup buttermilk, milk, or white wine
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2 tablespoons Dijon mustard
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2 tablespoons whole-grain mustard
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1/2 cup chopped fresh dill
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Freshly ground black pepper
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1/2 cup chopped celery
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1/2 cup chopped red onion