"Unlike mayonnaise-based potato salads, this one is lighter and keeps longer at picnics and outdoor get-togethers thanks to its mustard dressing. Use waxy red potatoes for their firm texture, and leave the skins on for visual appeal and dietary fiber...."
INGREDIENTS
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1 1/2 pounds red potatoes
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1/4 pound green string beans, stems removed
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2 tablespoons finely chopped shallots
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1 1/2 tablespoons whole-grain or Dijon mustard
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1 tablespoon red wine vinegar
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1/2 teaspoon kosher salt
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1/2 teaspoon freshly ground black pepper
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3 tablespoons olive oil
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2 tablespoons chopped scallions, optional