Gigot d’Agneau Rôti (Roast Leg of Lamb) with White Beans

Gigot d’agneau rôti is the French approach to roast leg of lamb: generous, aromatic and centred on a well-browned joint carved at the table. Garlic tucked into the meat and rosemary pressed over the surface give the lamb its familiar savoury perfume, while onion and carrot in the roasting pan help shape the pan juices. The white beans make the dish especially satisfying, absorbing the wine-enriched roasting juices so they become a simple built-in side rather than an afterthought. It is suited to a relaxed Sunday lunch or a more celebratory dinner, with the resting time keeping the meat juicy and easier to carve.
Cuisine style French home-style roast
Cooking style Crowd-friendly • Minimal cleanup
Time commitment Under 3 hours

Why this recipe works

  • Pan juices with depth: Roasting the lamb over onion and carrot builds a savoury base, while wine and water lift the browned bits into a glossy sauce for the beans.
  • Classic roast method: A hot initial roast encourages browning before the lower oven temperature finishes the lamb more gently.
  • Built-in side dish: Canned white beans absorb the lamb juices quickly, giving the dish a hearty accompaniment without a separate sauce.

Get the most out of this recipe

Timing notes

  • Rest before carving: Let the lamb rest loosely covered after roasting so the juices settle and the slices stay moist.
  • Serve the beans hot: Warm the beans after the lamb comes out of the oven so they are hot and glossy when the meat is sliced.

Ingredient notes

  • Bone-in lamb gives flavour: A bone-in leg helps create a richer roasting base and makes the dish feel more substantial at the table.
  • Use fresh rosemary: Fresh rosemary presses easily onto the lamb and gives a cleaner, more aromatic flavour than dried herbs.
  • Keep the beans intact: Stir the white beans gently as they warm so they absorb the pan juices without breaking down.

Common mistakes

  • Carving too soon: Slicing the lamb straight from the oven can cause the juices to run out onto the board rather than staying in the meat.
  • Overcooking the lamb: Use a thermometer and remove the lamb at the target internal temperature rather than relying only on time.
  • Letting the pan dry out: When deglazing, keep the pan over a steady medium heat and scrape the browned bits before they catch.

Make-ahead tips

  • Prepare the aromatics early: The onion, carrot, garlic and rosemary can be prepared ahead so the roasting stage moves quickly.
  • Reheat gently: Warm leftover beans with a little water and reheat sliced lamb gently at 160°C (320°F) to help prevent it drying out.

Equipment you'll need

Ingredients
Instructions
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  1. Heat the oven to 200°C (390°F). Peel and cut the onion and carrots into chunky pieces, then scatter them in a roasting pan.
  2. Pat the lamb dry, then rub all over with the olive oil, fine sea salt and black pepper. Peel and slice the garlic, then use the tip of a small knife to make little slits all over the lamb and tuck the garlic slices in; strip and chop the rosemary leaves and press them onto the surface.
  3. Set the lamb on top of the vegetables and roast for 20 minutes to brown. Reduce the oven to 170°C (340°F) and continue roasting for 55 to 65 minutes, or until a thermometer reads 55 to 60°C (130 to 140°F) for medium-rare, or 60 to 65°C (140 to 150°F) for medium.
  4. Transfer the lamb to a board, cover loosely and rest for 20 minutes. Spoon off excess fat from the roasting pan, leaving the browned juices behind.
  5. Put the roasting pan over a medium heat on the hob (or scrape the contents into a saucepan). Pour in the dry white wine and water, then simmer for 3 to 5 minutes, scraping up the sticky bits, until slightly reduced and glossy.
  6. Drain and rinse the canned white beans, then stir them into the pan juices and warm gently for 4 to 6 minutes until hot through. Slice the lamb and serve with the beans and spooned-over juices.

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Recipe notes

Tips

  • For deeper rosemary flavour, rub the chopped leaves into the lamb 30 minutes before roasting, then keep the lamb at room temperature while the oven heats.
  • If you prefer the beans looser, add a splash more water while warming and stir gently so they stay intact.
  • If serving pregnant people, young children, older adults, or anyone immunocompromised, cook the lamb to at least 63°C (145°F) and rest for 3 minutes before carving.

Substitutions

  • Replace Dry White Wine with water for an alcohol-free pan sauce; simmer a minute longer to concentrate the flavour.
  • Replace Fresh rosemary with fresh thyme for a softer, more floral herb note.

Storage

  • Refrigerate up to 3 days
  • Cool leftovers quickly, then refrigerate the lamb and beans in an airtight container. Reheat the beans gently in a saucepan with a splash of water, and warm sliced lamb in a 160°C (320°F) oven until piping hot; avoid overcooking so it stays juicy.

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Gigot d’Agneau Rôti (Roast Leg of Lamb) with White Beans
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Recipe overview

  • Servings: 4 servings
  • Total time: 2h 10min (25min active)
  • Difficulty: Medium
  • Cuisine: French
Freezer friendly Kid friendly

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