Gigot d’Agneau Rôti (Roast Leg of Lamb with Garlic and Herbs)

Gigot d’agneau rôti brings the French roast dinner into focus: a bone-in leg of lamb seasoned with garlic, rosemary, thyme and a little Dijon, then roasted until the outside is deeply browned and the centre stays juicy. The bone helps give the meat presence and flavour, while the herb paste works its way into small slits for a savoury, aromatic finish. A quick pan gravy made by deglazing the roasting tin with wine and lamb stock captures the browned juices and keeps the carved slices glossy. It is an impressive but straightforward main course, suited to Sunday lunch, Easter, or any meal where a generous roast is the centrepiece.
Cuisine style French roast dinner
Cooking style Crowd-friendly • Minimal cleanup
Time commitment Under 2 hours

Why this recipe works

  • Herb-led flavour: Garlic, rosemary, thyme and Dijon form a savoury rub that seasons the surface and the slits in the lamb.
  • Classic roasting method: Starting the lamb in a hot oven builds colour before a gentler roast cooks the meat through without drying it out.
  • Proper pan gravy: Deglazing the roasting tin with wine and stock captures the browned bits and turns them into a glossy sauce.

Get the most out of this recipe

Timing notes

  • Rest before carving: Allow the lamb to rest for 15 minutes, loosely covered, so the juices settle before slicing.
  • Serve soon after slicing: Carve just before serving and spoon over the hot pan juices to keep the meat warm and moist.

Common mistakes

  • Roasting past the target temperature: Use a thermometer at the thickest part of the lamb and remember the temperature will rise slightly as it rests.
  • Skipping the rest: Cutting straight away releases more juices onto the board and can make the meat seem drier.
  • Letting the pan juices catch: After roasting, pour off excess fat but keep the browned bits; they should be caramelised, not scorched.

Ingredient notes

  • Choose bone-in lamb: A bone-in leg gives the roast a classic shape and helps the meat cook with good flavour and structure.
  • Use fresh herbs: Fresh rosemary and thyme give the rub a cleaner, more aromatic flavour than dried herbs.
  • Balance the wine: If the gravy tastes sharp, simmer it a little longer so the wine softens and the sauce becomes rounder.

Serving ideas

  • Classic sides: Serve with roast potatoes, gratin dauphinois, green beans or a simple dressed salad.
  • Pan juices: Spoon the reduced wine and stock gravy over the sliced lamb rather than serving it dry.
  • Wine pairing: A medium-bodied red such as Côtes du Rhône or Pinot Noir works well with the garlic-herb crust.

Equipment you'll need

Ingredients
Instructions
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  1. Heat the oven to 220°C (430°F). Pat the lamb dry, then use the tip of a small knife to make deep slits all over.
  2. Crush the garlic to a paste, then finely chop the rosemary and thyme leaves. Mix with the dijon mustard, fine sea salt, black pepper and olive oil to make a thick rub.
  3. Rub the mixture all over the lamb, pushing some into the slits. Set the lamb in a roasting pan.
  4. Roast for 20 minutes to brown, then reduce the oven to 180°C (355°F). Continue roasting for 45 to 55 minutes, or until the thickest part reads 55 to 60°C for medium and the surface is well browned.
  5. Transfer the lamb to a board and rest for 15 minutes, loosely covered. Pour off excess fat from the roasting pan, leaving the browned bits behind.
  6. Set the roasting pan over a medium heat and add the dry white wine, scraping up the sticky bits as it bubbles. Add the lamb stock and simmer for 5 to 8 minutes until slightly reduced and glossy, then taste and adjust with a pinch more fine sea salt and black pepper if needed.
  7. Slice the lamb against the grain and arrange on a warm platter. Spoon over the pan juices and serve straight away.

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Recipe notes

Tips

  • For the juiciest result, use a thermometer and pull the lamb at 55 to 60°C for medium, then let it rise a few degrees as it rests.
  • If the pan juices taste a little sharp, simmer them for an extra minute or two to soften the wine and concentrate the flavour.
  • If serving anyone who is pregnant, elderly, or immunocompromised, cook the lamb to at least 63°C and rest well before slicing.

Substitutions

  • Replace Dijon mustard with whole-grain mustard for a coarser texture in the herb rub.
  • Replace Dry White Wine with dry red wine for a deeper, more robust pan gravy.
  • Replace Fresh thyme with Fresh rosemary for a more pronounced rosemary flavour.

Storage

  • Refrigerate up to 3 days
  • Cool leftovers quickly, then refrigerate the sliced lamb and pan juices separately in airtight containers. Reheat lamb gently in a 160°C (320°F) oven with a spoonful of pan juices until piping hot; freeze for up to 2 months and defrost overnight in the fridge.

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Recipe overview

  • Servings: 4 servings
  • Total time: 1h 50min (20min active)
  • Difficulty: Easy
  • Cuisine: French
  • Allergens:
    Mustard
Beginner friendly Freezer friendly

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