Feeds 10 people Ingredients 3 pounds small white potatoes 1 cup mayonnaise 1/4 cup buttermilk 2 tablespoons Dijon mustard 2 tablespoons yellow mustard 2 tablespoons sugar Juice of 1 lime 1/2 cup chopped fresh dill 1/2 cup chopped celery 1/2 cup chopped red onion...