Gigot d’agneau, or roast leg of lamb, is a familiar centerpiece for French Easter meals, often served with spring vegetables and potatoes. This version is rubbed with garlic, rosemary, thyme, and Dijon mustard, then roasted until tender and served with a simple pan sauce; seasoning and accompaniments vary from household to household and region to region.
Ingredients
- 1 bone-in leg of lamb, 4½–5 lb (2–2.3 kg), preferably trimmed of excess surface fat
- 6 garlic cloves (about 18 g), finely grated or crushed
- 2 tbsp chopped fresh rosemary (about 6 g), plus a few small sprigs if desired
- 1 tbsp fresh thyme leaves (about 3 g), or 1 tsp dried thyme (about 1 g)
- 1 tbsp Dijon mustard (15 g)
- 2 tbsp olive oil (30 ml)
- 2 tsp kosher salt (about 10 g; use less if using fine table salt)
- 1 tsp freshly ground black pepper (about 2 g)
- 1 small shallot (about 40 g), finely chopped
- 1 cup (240 ml) low-sodium chicken or lamb stock, divided
- 1 tbsp unsalted butter (14 g), cold
Instructions
- Heat the oven and prepare the lamb. Position a rack in the center of the oven and preheat to 425°F (220°C). Pat the lamb dry with paper towels so the seasoning adheres and the surface browns well. If the leg is tied with butcher’s twine, leave the twine in place for roasting; it helps the meat keep an even shape.
- Make the herb rub. In a small bowl, mix the garlic, rosemary, thyme, mustard, olive oil, salt, and pepper into a thick paste. Rub it over the lamb, including the sides and any exposed surfaces. If there is a natural seam between muscles, work a little of the mixture into it without cutting deeply into the meat.
- Start roasting at high heat. Set the lamb, fat side up, on a rack in a roasting pan. Roast at 425°F (220°C) for 15 minutes to encourage browning. If you do not have a rack, arrange the lamb on a bed of thickly sliced onion or on two heatproof metal spoons laid in the pan; do not use a glass dish under the high heat.
- Lower the oven temperature. Reduce the oven to 350°F (175°C). Carefully pour ½ cup (120 ml) of the stock into the bottom of the pan, not over the seasoned lamb. Roast for about 65 minutes more, then begin checking the temperature. The total roasting time is about 80 minutes, but the leg’s shape, starting temperature, and oven can change the timing. If needed, continue roasting and check again every 10 minutes.
- Check doneness with a thermometer. Insert an instant-read thermometer into the thickest part of the meat, avoiding the bone. The USDA FSIS safe minimum for a whole cut of lamb is 145°F (63°C), followed by a 3-minute rest. If the temperature is below that point, return the lamb to the oven and check again after a short interval. Do not rely on color or time alone to judge safety.
- Rest the roast. Transfer the lamb to a carving board, tent it loosely with foil, and rest for 15 minutes. This is longer than the required three-minute safety rest and gives the juices time to settle. Keep the foil loose rather than wrapping the meat tightly, which can soften the browned exterior.
- Make the pan sauce. While the lamb rests, spoon off excess fat from the roasting pan, leaving the browned juices. Set the pan over medium heat if it is stovetop-safe, or transfer the drippings to a small saucepan. Add the shallot and cook for 2–3 minutes, stirring, until softened. Pour in the remaining ½ cup (120 ml) stock and scrape up the browned bits. Simmer for about 5 minutes, then strain if you prefer a smooth sauce. Remove from the heat and whisk in the cold butter. Taste before adding extra salt.
- Carve and serve. Remove the twine, if used. For a bone-in leg, cut thin slices across the grain, working around the bone; turn the leg as needed to reach the meat on each side. Arrange the slices on a warm platter and spoon a little sauce over them, serving the rest at the table.
Tips
- Use a thermometer, not a fixed clock. Bone-in legs vary in thickness, and a narrow end can finish well before the thick center. Check in more than one spot, avoiding the bone, and return the roast to the oven if any thick section has not reached 145°F (63°C). The timing in the recipe is a useful estimate, not a guarantee.
- Adjust salt for the type you have. The listed amount suits kosher salt, whose crystals are less dense than fine table salt. If using table salt, start with about 1¼ teaspoons (roughly 7 g) and add more only after tasting the sauce. A very salty stock is another reason to season the finished sauce carefully.
- Substitute herbs thoughtfully. If fresh rosemary is hard to find, use 2 teaspoons dried rosemary, crushed between your fingers; it will taste more concentrated, so do not replace the fresh amount spoon for spoon. Dried thyme is included as an alternative. Dijon mustard adds a mild tang and helps the rub cling; whole-grain mustard works too, with a more textured coating.
- Keep the pan juices from scorching. Add the first portion of stock after the high-heat browning stage and make sure a little liquid remains in the pan during the longer roast. If the pan looks dry, add a splash of water or stock. The liquid should moisten the drippings, not cover the meat.
Serving Suggestions
For a traditional-feeling Easter table, serve the lamb with flageolets, the small pale-green French beans often paired with roast lamb. They can be difficult to find outside specialty grocers; canned butter beans or cannellini beans are practical substitutes. They are larger and creamier, so the plate will be less delicate, but they take well to the lamb’s pan sauce. Warm cooked beans with a little stock, chopped parsley, and a spoonful of the sauce rather than adding them to the roasting pan.
Roasted potatoes, gratin dauphinois, or simply boiled new potatoes are also good choices. Add a green vegetable such as asparagus, green beans, or peas to bring freshness to the plate. A crisp salad with a sharp vinaigrette can balance the richness of the lamb and potatoes. Set the sauce out separately so people can choose how much they want, and offer Dijon mustard at the table for a sharper accompaniment.
For carving, a long, sharp knife makes thin slices easier, especially near the bone. If serving a group, carve only what you need at first and keep the remaining meat loosely covered; it stays warmer as a larger piece. Put the platter, plates, and serving bowl for the sauce on the table before the roast comes out, since the resting window is also when the sauce is finished.
Variations
Families and regions prepare Easter lamb in different ways, so this herb-and-mustard rub is one useful approach rather than a single definitive version. For a more restrained flavor, leave out the mustard and use only garlic, olive oil, salt, pepper, rosemary, and thyme. For a brighter rub, add the finely grated zest of one lemon; avoid adding much lemon juice before roasting, as it can make the surface wetter and slow browning.
For a Provençal-inspired variation, add 1 teaspoon (about 2 g) of crushed fennel seed and a little chopped parsley to the herb mixture. Fennel brings a subtle anise note, so use less if you want the rosemary to remain dominant. You can also add a few anchovy fillets, finely mashed into the rub. They lend savory depth rather than a strong fish flavor, but leave them out for a simpler or fish-free version.
If a bone-in leg is unavailable, a boneless leg can be used, ideally tied into an even shape by a butcher. It may cook faster and more unevenly than the bone-in roast, so begin checking its temperature earlier and follow the same safe minimum and resting guidance. A smaller leg also works, but reduce the roasting estimate and let the thermometer—not a direct proportion of the original time—determine when it is done.
Storage and Reheating
Refrigerate leftover lamb and sauce within 2 hours of cooking. Store them in separate airtight containers, or keep the meat in a shallow container so it cools promptly. Cooked lamb keeps for 3–4 days in the refrigerator. If you will not use it within that time, freeze it in meal-size portions with a little sauce to help protect it from drying out; for best quality, use frozen leftovers within about 2–3 months.
Thaw frozen lamb in the refrigerator, not on the counter. Reheat sliced portions gently in a covered skillet with a splash of stock or sauce, or in a covered oven-safe dish at 325°F (165°C). Heat leftovers to 165°F (74°C), checked with a food thermometer. Reheating can make lamb less tender, so use moderate heat and stop as soon as the safe temperature is reached. Cold leftover slices can also be added to sandwiches or salads, provided they have been refrigerated promptly and kept cold.
Frequently Asked Questions
Is roast lamb a traditional French Easter food?
Yes. Roast lamb, often called gigot d’agneau, is a well-established centerpiece for Easter meals in France. What accompanies it and how it is seasoned varies by region and family; potatoes, spring vegetables, beans, garlic, and herbs are all common choices.
Can I prepare the lamb the day before?
You can mix the rub and apply it to the lamb up to 24 hours ahead, then cover and refrigerate it. This is a convenient way to plan, but it does not replace safe refrigeration. Before roasting, pat away any excess moisture on the surface if needed, and allow extra oven time if the meat is still very cold. Do not leave raw lamb at room temperature for an extended period.
How do I know when the lamb is done?
Use an instant-read thermometer in the thickest part, away from the bone. For a whole cut of lamb, the USDA FSIS safe minimum is 145°F (63°C), followed by a 3-minute rest. Because the roast continues to rest after it leaves the oven, check the reading carefully and do not substitute a visual color test for a thermometer.
Can I use a boneless leg of lamb?
Yes. Ask the butcher to tie it into a compact, even shape, or tie it with kitchen twine at regular intervals. A boneless roast can cook faster, and its thickness may differ from a bone-in leg, so start checking early. Follow the same internal temperature guidance and allow it to rest before carving.
What can I use instead of flageolet beans?
Butter beans or cannellini beans are easy substitutes and work well with the sauce. Their texture is softer and their size larger than flageolets, but they make a satisfying side. Green beans, peas, or potatoes are other good options if you would rather serve a vegetable than another bean dish.
Why did my lamb turn out tough?
Common causes include slicing with the grain, carving before the meat has rested, or cooking the roast well beyond the temperature you intended. Slice across the grain in thin pieces and give the leg its full rest. If a portion is already firm, serve it in thinner slices with warm pan sauce; leftover slices can also be gently warmed in sauce rather than reheated dry.
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Safety notes: safe minimum internal temperatures from USDA FSIS; raw and undercooked fish guidance from the U.S. FDA. Food safety notes
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