Ingredients

  • 1 large sweet potato, peeled, halved, and sliced 1/2 inch thick
  • 3 large parsnips, peeled, halved, and cut into 2-inch pieces
  • 1 tablespoon ginger, finely grated peeled fresh
  • 3 tablespoons olive oil, plus more for serving
  • 2 tablespoons light-brown sugar
  • 14 teaspoon cayenne pepper
  • 1 pork tenderloin, excess fat and silver skin removed (about 12 ounces)
  • coarse salt
  • 1 bunch watercress, trimmed
  • 1 lime (cut into wedges for serving)

Method

  • Preheat oven to 475 degrees.
  • On a rimmed baking sheet, toss sweet potato, parsnips, and ginger with oil and spread in an even layer.
  • Mix together brown sugar and cayenne and rub all over pork; add to sheet.
  • Season pork and vegetables with salt and roast until an instant-read thermometer inserted in center of pork reads 145 degrees, 20 to 22 minutes.
  • Let pork rest 10 minutes before serving.
  • Toss vegetables with watercress, drizzle with olive oil, and season.
  • Thinly slice pork and serve with any accumulated juices from sheet, the salad, and lime wedges.