Rosemary, thyme and loads of garlic flavor this traditional (and boneless) roast leg of lamb. Recipe below.
LAMB IS A YEAR-ROUND FAVORITE WITH US, in all its forms. But in the spring, what we really want is leg of lamb. There is just something celebratory and spring-welcoming about roasting this big joint of meat, its aroma filling the house, then carving and sharing it with others. Even though it’s just the two of us now, we couldn’t resist making leg of lamb this year.
This year’s model is boneless. Although we’ve roasted many legs of lamb over the years, this was our first boneless one. We’re big fans of bone-in cuts of meat generally—the bone often adds to the flavor of the finished dish. But one of the less fun things about roasting a leg of lamb is carving around the sizeable, oddly shaped bone. While the boneless version isn’t one solid piece of meat, it is tightly rolled and wrapped in an oven-safe mesh netting or string to help it keep its shape. (If you’re grilling it, you remove the netting or string before cooking.) And a 5- to 6-pound leg of lamb is all meat.
Bone-in or boneless, a leg of lamb is as forgiving in cooking as it is impressive to serve. The lamb itself is so delicious, whatever you do to it with seasonings and however you cook it, it is probably going to be really, really good. Popular flavoring choices, for good reason, are garlic (lots of it), rosemary and thyme. We also added some Dijon mustard to ours; it disappeared into the meat with no mustardy tang, just upping the overall umami and goodness.
Roast Boneless Leg of Lamb
Ingredients
- 1 boneless leg of lamb, 5 – 6 pounds
- 3 large cloves garlic, divided
- salt and freshly ground black pepper
- 1 tablespoon Dijon mustard (see Kitchen Notes)
- 1 tablespoon olive oil
- 2 tablespoons chopped fresh rosemary (or 1 tablespoon dried)
- 1 tablespoon fresh thyme leaves (or 1-1/2 teaspoons dry)
Instructions
- Preheat oven to 375ºF. Leaving the leg of lamb in its mesh netting or string, blot it dry with paper towels. Turn the leg fat side up. Peel 2 cloves of the garlic and slice into slivers. Using a sharp knife, poke shallow holes into the lamb and insert garlic slivers. Turning the knife after inserting it will make putting the garlic slivers in place easier. Evenly space them; you want about 20 or so slivers overall.
- Season the lamb generously with salt and pepper on both sides. Mince the remaining clove of garlic. In a small bowl mix the Dijon mustard, olive oil, garlic, rosemary and thyme. Using your hands, spread it all over the lamb.
- Place the leg of lamb on a rack in a roasting pan, fat (and garlic slivers) side up. Place in the oven. NOTE: Set the oven rack so that the lamb is centered vertically in the oven, so it will cook evenly.
- Roast lamb to desired doneness. For medium-rare, check at about 1 hour 15 minutes, but you will likely need about 1-1/2 hours. Internal temperature (with an instant read thermometer inserted well into the roast) should be about 130 – 135ºF. For medium, you want 140 – 145ºF; for well done, 150 – 155ºF.
- Remove lamb from oven and let rest 10 minutes. Cut away the netting or string, then carve and serve.
Lamb is probably my favorite red meat. It’s been a long time since I’ve roasted an entire leg — fun to do, but that’s a lot of meat! So boneless is the way I usually go — just a whole lot easier, and takes a bit less time in the oven too. Like the way you’ve flavored yours — looks terrific. Thanks!
Thanks, John! It is indeed a lot of meat, as we’re fully understanding now. Besides a couple of meals of lamb and sides, we made an Instant Pot dish of lamb and white beans which may or may not appear here in the future—and there’s still plenty of lamb left! I’m thinking freezing for using later is probably in the cards.
I’ve never had leg of lamb.
When my daughter was growing up we had loin or shoulder chops every week. The loin chops only required garlic, salt and pepper but the shoulder chops “needed” the addition of dijon mustard and rosemary because the meat had a distinctly different flavor. Is leg of lamb the same way?
I’m not saying that all cuts of beef or pork taste exactly the same but lamb seemed much more noticeable to us.
When I say I love lamb, I’m always thinking of the loin chops.
Thanks for another recipe that leaves me hungry, Terry.