Ingredients

  • 2 cups button mushrooms, halved
  • 2 tablespoons olive oil
  • Kosher salt and freshly ground black pepper
  • 1 pound baby new red potatoes
  • 1 clove garlic, smashed
  • 3/4 cup reduced-fat sour cream
  • 1/4 cup low-fat plain yogurt
  • 1/4 cup well-shaken buttermilk
  • 1 tablespoon champagne vinegar
  • Small pinch cayenne
  • 1/4 cup roughly chopped parsley leaves
  • 1/4 cup chopped chives
  • 2 tablespoons chopped green onion
  • 2 tablespoons chopped dill
  • 1 tablespoon chopped tarragon leaves
  • Dash Worcestershire
  • Dash hot sauce

Method

  • Preheat the oven to 450 degrees F.
  • On a rimmed baking sheet, toss the mushrooms with 1 tablespoon olive oil, and season with salt and pepper, to taste.
  • On another rimmed baking sheet, toss the potatoes with the remaining 1 tablespoon olive oil, and season with salt and pepper, to taste.
  • Put both pans in the oven, and roast until the mushrooms are browned and the potatoes are cooked through, about 20 minutes, tossing once and rotating the sheets halfway through.
  • Remove the pans from the oven, and let cool slightly.
  • While the potatoes and mushrooms roast, make the dressing.
  • Add the garlic, sour cream, yogurt, buttermilk, and vinegar into a food processor and blend to combine.
  • Add the cayenne, herbs, Worcestershire, and hot sauce.
  • Blend until fully incorporated and the dressing is a pale green.
  • Season the dressing with salt and pepper, to taste, if needed.
  • Add the potatoes and mushrooms to a serving bowl and pour in the dressing.
  • Toss to coat and serve warm or room temperature.