Herb-Crusted Roast Lamb with Celeriac Mash

British · Autumn · 180 min · Serves 6 · By Lesapor Test Kitchen

This herb-crusted roast lamb combines robust flavors of rosemary and garlic with a keto-friendly celeriac mash. Ideal for an autumn gathering, this dish can be prepared ahead and finished in the oven, allowing you to enjoy the company of your guests. Using high-quality, grass-fed lamb and fresh herbs will make a notable difference in flavor.

Ingredients

  • 1.8 kg boneless leg of lamb, trimmed
  • 4 tablespoons olive oil
  • 5 cloves garlic, minced
  • 2 tablespoons fresh rosemary, chopped
  • 1 tablespoon fresh thyme, chopped
  • 2 teaspoons sea salt
  • 1 teaspoon black pepper, freshly ground
  • 1.2 kg celeriac, peeled and cubed
  • 50 g unsalted butter
  • 200 ml heavy cream
  • Flaky sea salt, to taste
  • Parsley, for garnish

Method

  1. Preheat your oven to 180°C (350°F). Remove the lamb from the refrigerator and allow it to reach room temperature.
  2. In a small bowl, mix together the olive oil, garlic, rosemary, thyme, sea salt, and black pepper to create a paste.
  3. Place the lamb on a roasting rack inside a roasting pan. Rub the herb paste all over the lamb, ensuring it is evenly coated.
  4. Roast the lamb in the preheated oven for approximately 1.5 to 2 hours, or until the internal temperature reaches your desired level of doneness (60°C/140°F for medium-rare).
  5. While the lamb is roasting, prepare the celeriac mash. In a large pot of salted water, boil the celeriac cubes until tender, about 20-25 minutes.
  6. Drain the celeriac and return it to the pot. Add the butter and heavy cream, mashing until smooth and creamy. Season with flaky sea salt to taste.
  7. Once the lamb is cooked, remove it from the oven and let it rest for 15 minutes before slicing.
  8. Serve the sliced lamb with celeriac mash, garnishing with parsley. Enjoy your autumn feast.