Perfect roast lamb

A succulent joint of lamb with herbs and roasted garlic for the perfect family roast.

Serves: 4

Preparation time:  10 minutes

Cooking time:  1 hour and 30 minutes

Cooling time: 15 minutes (resting time)

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You will need

  • 1.4kg part-boned leg of lamb
  • 2 leeks, trimmed and halved lengthways
  • 2 red onions, peeled and halved
  • 1 tablespoon olive oil
  • A few sprigs of fresh rosemary
  • A few sprigs of fresh thyme
  • Sea salt and black pepper
  • 2 garlic bulbs, tops sliced off (to reveal the cloves)
  • 2 tablespoons plain flour
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Recipe Information

Step by step guide to making Perfect roast lamb

  1. Weigh the lamb and calculate the cooking time. Preheat the oven to 200°C, fan 180°C, gas mark 6.
  2. Lay the leeks and halved onions over the base of a roasting tin. Rub the lamb with olive oil and sprinkle with the herbs. Season well and lift onto the vegetables.
  3. Roast for 30 minutes. Reduce the heat to 170°C, fan 150°C, gas mark 5 and cook for a further 15 minutes per 500g. Add the garlic bulbs to the roasting tin.
  4. Remove the joint from the oven and lift onto a carving platter. Cover with foil and a clean tea towel and leave to rest.
  5. Remove the cooked vegetables and garlic from the roasting tin and drain off any fatty residues. Stir a little flour into the tin and gradually add water or stock and simmer over a low heat, stirring well until thickened to make a gravy.
  6. Serve slices of the lamb with the gravy and roasted garlic bulbs, as well as your choice of seasonal vegetables. 

Cook's tip: The garlic takes on a fantastic sweet flavour when roasted like this. You can squeeze out the individual cloves and eat with the roast, or if you're not such a garlic fan, they just add a fantastic aroma and flavour to the roasted meat during cooking. They also look quite decorative on the platter too!

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Video for Perfect roast lamb

Learn how to carve delicious slices of succulent lamb from a roasting joint on the bone. Watch our step-by-step guide with family recipe writer Holly Bell.

Nutritional information for Perfect roast lamb

Nutritional information for Perfect roast lamb

Nutrition type per serving
Calories 401 kcal
Total Fat 17.3g
Saturated Fat 6.14g
Salt 0.2g
Sugar 5.7g

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