Roasted Leg Lamb Rosemary

Juicy, roasted leg of lamb glistens, infused with rosemary, ready for carving and serving. Save to Pinterest
Juicy, roasted leg of lamb glistens, infused with rosemary, ready for carving and serving. | recipesbymarina.com

This dish features a bone-in leg of lamb seasoned with a fragrant blend of garlic, rosemary, thyme, and lemon zest. Garlic slices are inserted directly into the meat for deep flavor penetration, while a herb paste envelops the surface, creating a savory crust during roasting. The lamb rests atop a bed of onions, carrots, and celery, which roast alongside and add depth to the pan juices. Roasting begins at a high temperature to sear the meat, then slows to ensure tenderness and medium-rare doneness. Once rested, the lamb is carved and served with reduced pan juices for a rich, aromatic finish. Ideal for gatherings or comforting dinners, this preparation enhances the natural flavors through careful seasoning and slow roasting.

Discovering this roasted leg of lamb recipe felt like unearthing a cherished family secret. The blend of fresh rosemary and garlic fills the kitchen with an aroma that instantly whisks me back to cozy Sunday dinners surrounded by loved ones.

I remember the first time unexpected guests showed up just as I was about to start dinner. This recipe came together quickly, filling the house with such wonderful smells that everyone never stopped complimenting the meal.

Ingredients

  • Bone-in leg of lamb: I always pick a trimmed cut for even roasting and easier carving afterward
  • Fresh rosemary and garlic: These lend the iconic aroma and flavor that define this roast
  • Onions, carrots, celery: They create a natural roasting bed that adds sweetness and depth to the pan juices
  • Dry white wine or chicken broth: I prefer broth to keep the flavors lighter, but wine adds a beautiful complexity

Instructions

Get Everything Ready:
Preheat the oven to 220°C (425°F). Mix rosemary, garlic, thyme, lemon zest, salt, pepper, and olive oil into a fragrant paste. Pat the lamb dry then carefully make deep incisions to nestle in garlic slices — the smell here is irresistible.
Building the Flavor:
Rub the herb paste thoroughly all over the leg, making sure every nook is covered. Scatter the onions, carrots, and celery evenly in a roasting pan, then nestle the lamb fat side up on top.
The Part Where Magic Happens:
Pour the wine or broth around the vegetables carefully so the herb rub stays put. Roast at high heat for 20 minutes to develop a beautiful crust, then lower the oven to 180°C and roast for another hour until the meat reaches that perfect medium-rare temperature.
Rest and Serve:
Remove the lamb and tent it loosely with foil to let the juices redistribute. Strain pan juices and skim fat for a silky sauce served with slices of tender lamb.
Save to Pinterest
| recipesbymarina.com

This roast has become more than just a meal. It’s a reason to gather around the table, celebrate milestones, and make memories that linger long after the last bite.

Keeping It Fresh

I love using fresh herbs from my garden whenever possible. The rosemary’s piney fragrance and fresh garlic punch elevate this dish in ways dried spices simply can’t match.

Serving Ideas That Clicked

Pairing the lamb with roasted potatoes or a crisp green salad balances the rich flavors beautifully. Also, a dollop of mint sauce or a drizzle of pan jus always brings the dish together perfectly.

A Time This Recipe Saved the Day

Once, when friends cancelled last minute, I wrapped the leftovers and later transformed them into a hearty stew. It just goes to show how versatile and forgiving this recipe is.

  • Remember to save those pan juices — they’re liquid gold for sauces
  • Don’t skip the resting time even if you're hungry — it makes all the difference
  • Feel free to experiment with thyme or lemon zest to match your mood
Aromatic leg of lamb roast, cooked to perfection, sits atop roasted vegetables for a holiday dinner. Save to Pinterest
Aromatic leg of lamb roast, cooked to perfection, sits atop roasted vegetables for a holiday dinner. | recipesbymarina.com

Thanks for spending this little kitchen moment with me. May your lamb roast bring as much joy and comfort to your table as it has to mine.

Roasted Leg Lamb Rosemary

Tender leg of lamb infused with rosemary and garlic, slow-roasted on a bed of vegetables.

Prep 20m
Cook 90m
Total 110m
Servings 6
Difficulty Medium

Ingredients

Meat

  • 1 bone-in leg of lamb, trimmed, weighing between 4 and 5 pounds

Marinade & Seasonings

  • 4 cloves garlic, thinly sliced
  • 3 tablespoons fresh rosemary, finely chopped
  • 2 tablespoons fresh thyme leaves (optional)
  • 2 teaspoons kosher salt
  • 1 teaspoon freshly ground black pepper
  • 3 tablespoons olive oil
  • Zest of 1 lemon

Vegetables (for roasting bed)

  • 2 large onions, thickly sliced
  • 3 large carrots, peeled and cut into large chunks
  • 2 celery stalks, cut into large chunks

Liquid

  • 1 cup dry white wine or low-sodium chicken broth

Instructions

1
Preheat Oven: Set the oven to 425°F to prepare for roasting.
2
Prepare Herb Paste: Combine rosemary, garlic, thyme (if used), lemon zest, kosher salt, black pepper, and olive oil in a small bowl to form a paste.
3
Prepare Lamb: Pat the leg of lamb dry with paper towels. Using a sharp knife, make small deep incisions throughout the meat and insert garlic slices into each.
4
Apply Herb Paste: Rub the herb paste evenly over the entire surface of the lamb, ensuring thorough coverage.
5
Arrange Vegetables: Spread onions, carrots, and celery evenly in a large roasting pan, then place the lamb on top with the fat side facing upward.
6
Add Liquid: Pour white wine or chicken broth into the pan, avoiding contact with the lamb to preserve the herb coating.
7
Roast Lamb Initial High Heat: Roast for 20 minutes at 425°F to develop a crust.
8
Lower Heat and Continue Roasting: Reduce oven temperature to 350°F and continue roasting for 60 to 75 minutes, or until an internal temperature of 135–140°F is reached for medium-rare, measured at the thickest part of the meat.
9
Rest the Meat: Remove lamb from oven, loosely cover with aluminum foil, and rest for 15 to 20 minutes to allow juices to redistribute.
10
Prepare Pan Juices: Strain the pan juices, skim off excess fat, and serve alongside the carved lamb. Optionally, reduce the strained juices with a splash of wine to create a sauce.
Additional Information

Equipment Needed

  • Large roasting pan
  • Sharp chef’s knife
  • Small mixing bowl
  • Meat thermometer
  • Cutting board
  • Aluminum foil

Nutrition (Per Serving)

Calories 410
Protein 45g
Carbs 7g
Fat 22g

Allergy Information

  • No major allergens present. Verify broth or wine labels for potential allergens.
Marina Costa

Passionate home cook sharing simple, flavorful recipes and helpful cooking tips for everyday food lovers.