Recipe: Slow-roasted Leg of Lamb with Garlic & Rosemary (Heston Blumenthal) (2024)

We were watching MasterChef Australia one evening, and Heston Blumenthal, one of my favorite British chef came on and showed the contestants how to cook a leg of lamb. On Hubby's birthday this year, he put in a request for Heston's lamb - we've cookedroast leg of lambbefore, but Heston's cooking and carving method is slightly different, so I was excited to try it!

Slow-roasted leg of lamb with garlic and rosemary

Heston suggests using anchovy fillets,as it gives the lamb a unique savoriness but since this is not something we can get easily from regular supermarkets here, I forego it and settled for garlic and rosemary only, and followed the rest of the recipe. The garlic is blanched in milk first before placed in the leg of the lamb as it gives the garlic a mild, sweet and nutty flavour; if using raw garlic, the taste will be more pungent. If you feel that pouring away 400ml milk just for blanching the garlic is wasteful, then by all means skip this step and just use raw garlic. Personally I feel it won't affect the taste of the lamb much.

The leg of lamb is slow roasted at 90°C until the internal temperature reaches 57°C, this took us slightly over 2 hours for a-2kg lamb. Rest it for 30 minutes in a warm place, before carving.

Now here comes the most important part - carving the meat. This is the key to achieving the extra tender, juicy mouthfeel. The meat has to be cut from the top, downwards until the knife meets the bone, then the knife is run horizontally across the meat, just above the bone. This way you get chunks of meat, rather than slivers. I never would have thought this would make the world of difference, but it does!

This is by far the best of roast leg of lamb I have ever tasted. Beautifully pink meat throughout and slicing it the Heston way makes it taste extra tender and delicious! We served the tender lamb with homemade mint sauce, cheesy mash pots, grilled zucchini, and quinoa salad. Birthday boy was absolutely delighted with the meal.

Slow-cooked roasted leg of lamb with garlic and rosemary
Recipe by Baby Sumo, adapted from Heston Blumenthal
Preparation time: 10 minutes
Cooking time: 2 hrs 30 minutes
Serves 6-8

Ingredients

2.0kg lamb leg, on the bone
3 tbsp canola oil
400g skim milk
6 garlic cloves, halved
4 rosemary sprigs
Salt, to taste

To serve
Homemade fresh mint sauce
Gravy

1. Preheat oven to 90°C (roast mode).

2. Heat oil in a flameproof roasting pan over high heat until smoking. Season lamb with salt, then sear until completely golden brown. Place a roasting rack underneath the lamb set inside the pan.

3. Meanwhile, bring 100g milk to the simmer in a saucepan over medium heat. Add garlic and allow to simmer for 1 minute. Drain through a fine sieve, retaining the garlic, and discarding the milk. Repeat process 3 times using the remaining milk.

4. Cut blanched garlic into slivers. Using a sharp knife, cut small slits in the surface of the lamb at regular intervals. If necessary, use a small spoon to enlarge holes. Fill holes with an anchovy slice, a garlic sliver and a few rosemary leaves.

5. Place lamb in oven for 2 - 2 1/4 hours or until internal temperature reaches 57°C.

6. Remove lamb from oven, wrap in foil, and set aside to rest for at least 30 minutes.

7. Meanwhile, place roasting pan over medium heat. Add a splash of white wine to deglaze, whisk in mustard and stock, then reduce to a saucy consistency. Pour into a warm jug.

8. To serve, remove foil, and place lamb on a chopping board. Cut meat from the top, downwards, until the knife meets bone, to desired thickness, all the way along the top of the leg. Run the knife horizontally across the meat, just above the bone, separating the slices. Turn over and repeat on other side.


9. Arrange lamb on a platter and serve with side dishes of your choice. We served with homemade mint sauce, cheesy mash pots, grilled zucchini, and quinoa salad (recipe here).


Homemade mint sauce

Check out the recipe here for slow roasted leg of lamb with anchovies, garlic and rosemary.

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*This recipe was featured on Asian Food Channel's Facebook page on 17 December 2014.

Recipe: Slow-roasted Leg of Lamb with Garlic & Rosemary (Heston Blumenthal) (2024)

FAQs

Is it better to cook lamb slow or fast? ›

Slow cooking in liquid transforms tougher cuts of lamb into fork-tender meat. Neck, shoulder and belly, either diced or as whole joints, are the best cuts for slow cooking and need to be cooked for at least 2 hrs at 150°C to soften the meat.

How does Gordon Ramsay cook roast lamb? ›

And when you have a gorgeous cut, like a rack of lamb, you can cook it the good ol' Gordon Ramsay way—which is to say, lightly pan-sear it first, then baste it with an herby, garlicky butter, and finally finish it off in the oven until it's still pink and juicy in the middle. It comes out perfectly every time.

What is the best cut of lamb for slow cooking? ›

Cuts of lamb that are popular for slow cooking include the shoulder, leg, forequarter, shanks, neck chops, lamb ribs, and some sausages. These cuts are usually tougher because they have lots of connective tissue and fats, but this makes them perfect for slow and low methods of cooking.

What temperature is lamb cooked at? ›

An internal temperature of 145°F means that the meat will be at a medium-well doneness, and this is the official safe temperature recommended by the USDA. Ground lamb is the one cut of lamb that is an exception — it should be cooked to 160°F.

Do you need to sear lamb before slow cooking? ›

No, you don't have to brown lamb before slow cooking. The meat will still become moist and fall-off-the-bone tender. However, the slow cooker will never be hot enough to brown the meat, so if you decide to skip this step be aware that the finished dish may look paler than expected.

Should you sear the leg of lamb before roasting? ›

For the perfect roast lamb, we recommend seasoning the surface of the meat, and then searing it, especially fat side down in a pan before roasting. Why bother with searing? Contrary to some stories, searing is less about locking in moisture, and all about improving the flavour!

What is the best temperature to roast lamb? ›

Roast leaner cuts of lamb in a hotter oven (450°F) to get a lovely brown crust and a well-cooked center; cook fattier cuts of lamb low and slow (325°F) to render all the fat and allow the lamb to cook in its juices. Due to residual heat, your lamb will continue to cook even after you pull it out of the oven.

What is the most popular seasoning for lamb? ›

Fresh rosemary, fresh garlic, lemon zest, black pepper, and salt are simple but amazing flavors that pair amazingly with the lamb! Each of these ingredients adds its unique warmth and depth to enhance the flavor of the dish.

Why is my slow roast lamb tough? ›

Slow-cooking lamb requires patience. While cooking, resist the urge to keep checking on the lamb and refrain from opening the oven or slow cooker. Opening the lid or foil too often will lower the temperature and extend the cooking time, making the meat less juicy and tender.

Why is my slow cooked lamb not tender? ›

Each slow cooker meal's cooking time differs depending on the meat and its weight. The low setting is important so you don't overcook it, potentially leaving you with a dry or tough meal.

Does cooking lamb legs for longer make it more tender? ›

It depends on the cut. If you cook a lamb shank low and slow, it will become more tender as long as you don't let it dry out. A lamb chop, on the other hand, will reach optimum tenderness at medium rare. After that it will become tougher as it cooks.

Can you overcook slow cooked lamb? ›

How long can you leave lamb in a slow cooker? It takes a long time to overcook most lamb cuts in the slow cooker. Cuts like the shoulder, shanks and forequarter are much more forgiving than a leg of lamb, and they can stay in the slow cooker for a couple more hours than the recommended cooking time.

Which cooking method is ideal for a leg of lamb? ›

Whether boneless or bone-in, the perfect leg of lamb should be either oven-roasted until blushing pink on the inside (with an internal temp around 130°F) or roasted long and slow for several hours until the meat is very tender and falls apart to internal temp around 175°F (I often use the slow cooker for that).

What temperature should lamb legs be cooked at? ›

We recommend the following temperatures:
  1. Rare 60°C.
  2. Medium rare 60–65°C.
  3. Medium 65–70°C.
  4. Medium well done 70°C.
  5. Well done 75°C.

What to serve with leg of lamb? ›

Get the Roasted Turnips recipe.
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  • Smashed Potatoes. PHOTO: ANDREW BUI; FOOD STYLING: MAKINZE GORE. ...
  • Saffron Rice. ...
  • Creamy Parmesan Polenta. ...
  • Red Potato Salad. ...
  • Peas & Carrots. ...
  • Greek Salad.
Mar 13, 2024

What cooking method is best for lamb? ›

Fattier cuts of lamb should be roasted long and slow at a low temperature, while leaner cuts of meat should be cooked at a high temperature for the first several minutes and then at a lower temperature the rest of the time. Braising is a popular technique for cooking less-tender cuts of lamb.

Does lamb become more tender the longer you cook it? ›

The leg and rack of lamb are perfect for herb-crusting and oven-roasting; since the shank and shoulder are a bit tougher, they fare well in stews or braises—the long cook time allows them to significantly break down and become fork-tender.

Should I cook lamb on high or low heat? ›

For a lean piece of meat, cook at 450 degrees F (230 degrees C) for the first 15 minutes, then turn the temperature down to 350 degrees F (175 degrees C) to continue roasting — the meat will take about 25 minutes per pound to reach medium rare.

Why is my slow cooked lamb tough? ›

Slow-cooking lamb requires patience. While cooking, resist the urge to keep checking on the lamb and refrain from opening the oven or slow cooker. Opening the lid or foil too often will lower the temperature and extend the cooking time, making the meat less juicy and tender.

References

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