Gigot d’Agneau Rôti (Roast Leg of Lamb) with White Beans
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
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
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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Recipe overview
- Servings: 4 servings
- Total time: 2h 10min (25min active)
- Difficulty: Medium
- Cuisine: French
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