Herbal-Crusted Gigot d'Agneau with Mint Velouté
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This is a French-style roasted leg of lamb with a fragrant herb crust, cooked on the Big Green Egg for smoky depth. The lamb is paired with a silky mint sauce and sweet-tart apricot chutney. The key technique is indirect roasting at 390°F / 200°C to medium-rare perfection. Total time is 2.5 hours including rest time, serving 4 people with restaurant-quality results.
Recipe by Mr Saucy aka Christophe
Christophe is a culinary professional with expertise in French and global cuisine. He has developed recipes and cooking techniques that bridge traditional methods with modern home cooking approaches. Christophe focuses on making classic culinary techniques accessible to home cooks through clear instruction and practical applications. He studied at Le Cordon Bleu Paris and has work experience at a two star Michelin restaurant.
Homecook turned pro with a Cordon Bleu Paris graduate
Quick Info
How Does This Create Restaurant-Quality Lamb at Home?
Traditional French technique uses a velouté—a light, cream-based sauce—instead of heavy gravy. This keeps the focus on the fresh herbs and lets the lamb's natural flavor shine through without being masked by dark, heavy drippings.
Professional chefs know that blanching herbs before adding them to warm sauce preserves their bright green color. Food science shows that shocking them in ice water stops the enzymes that turn herbs brown, keeping your sauce vibrant instead of muddy.
The Big Green Egg's ceramic walls create convection heat like a professional oven, but with subtle wood smoke. Indirect cooking at a steady 390°F / 200°C means the herb crust gets crispy while the inside stays perfectly pink and juicy.
Ingredients
Recipe yields 4 servings
For the Lamb
| Amount | Ingredient | Notes |
|---|---|---|
| 1300 g (about 3 lbs) | boneless leg of lamb (Gigot d'Agneau) | trimmed and tied into a uniform cylinder |
| 15 g (3 tablespoons) | fresh rosemary | finely minced for the crust |
| 10 g (2 tablespoons) | fresh thyme | leaves only |
| 3 g (1 teaspoon) | dried chili flakes | adjust for desired heat |
| 20 g (4-5 cloves) | garlic cloves | crushed into a paste |
| 45 g (3 tablespoons) | extra virgin olive oil | to bind the herb rub |
For the Mint Velouté
| Amount | Ingredient | Notes |
|---|---|---|
| 40 g (3 tablespoons) | unsalted butter | for the roux |
| 30 g (1/4 cup) | all-purpose flour | for the blonde roux |
| 500 g (2 cups) | white veal or chicken stock | high quality and well-filtered |
| 30 g (2 tablespoons) | mirin | adds subtle sweetness and depth |
| 5 g (1 teaspoon) | whole black peppercorns | to infuse the stock with gentle heat |
| 100 g (1/2 cup) | heavy cream (35% fat) | for the sauce liaison |
| 40 g (1 cup packed) | fresh mint leaves | blanched and shocked |
| 20 g (1/2 cup packed) | fresh flat-leaf parsley | blanched and shocked |
For the Apricot Chutney
| Amount | Ingredient | Notes |
|---|---|---|
| 100 g (2/3 cup) | dried apricots | finely diced |
| 80 g (1/2 medium) | red onion | finely minced |
| 20 g (1.5 tablespoons) | unsalted butter | for sautéing |
| 30 g (2 tablespoons) | cider vinegar | for the chutney acidity |
| 20 g (1 tablespoon) | honey | to balance the chutney |
Instructions
Prep the Lamb (2 Hours Before Cooking)
- 1
Make the Herb Paste
Mix the rosemary, thyme, chili flakes, garlic paste, and olive oil in a small bowl. This creates a fragrant rub that will form a crispy, flavorful crust on the lamb.
- 2
Season and Rest the Lamb
Rub the herb paste all over the lamb, coating it completely. Let it sit at room temperature for 2 hours. This brings the meat to room temperature so it cooks evenly from edge to center, preventing a gray band around the edges.
Prepare the Sauce Components
- 3
Infuse the Stock
In a small saucepan, bring the stock and black peppercorns to a gentle simmer. Cook for 10 minutes at around 185°F / 85°C—just below a boil. This releases the peppercorns' warmth slowly, creating a rounded background heat instead of sharp spice. Strain out the peppercorns and keep the stock warm.
- 4
Blanch the Herbs (The Color Trick)
Bring a small pot of water to a boil. Drop in the mint and parsley for exactly 30 seconds, then immediately plunge them into a bowl of ice water. This stops the cooking instantly and locks in the bright green color. Drain and squeeze out excess water.
Roast the Lamb
- 5
Set Up the Big Green Egg
Stabilize your Big Green Egg at 200°C / 390°F with the ConvEGGtor in place for indirect heat. Wait until the temperature holds steady for 10 minutes—fluctuating heat will burn the herb crust before the inside cooks. The ceramic walls create even convection heat like a professional oven.
- 6
Roast to Perfect Pink
Place the lamb on the grill grate and close the lid. Roast until a meat thermometer reads 52°C / 125°F in the thickest part, about 45-60 minutes. The lamb will continue cooking as it rests, reaching a perfect medium-rare 55-57°C / 131-135°F with a rosy pink center.
- 7
Rest the Meat (Lock In the Juices)
Transfer the lamb to a cutting board and tent loosely with foil. Rest for at least 20 minutes. This allows the muscle fibers to relax and reabsorb the juices, so they don't run out when you slice.
Finish the Sauce and Chutney
- 8
Make the Blonde Roux
In a medium saucepan, melt 40 g butter over low heat. Whisk in the flour and cook for 2 minutes, stirring constantly. Keep the heat gentle—you want it pale blonde, not brown. This removes the raw flour taste while keeping the light color needed for a classic velouté.
- 9
Build the Velouté
Gradually whisk the warm peppercorn-infused stock and mirin into the roux, adding about 1/4 cup at a time. Simmer gently for 15 minutes, whisking occasionally, until it thickens enough to coat the back of a spoon. The mirin adds a subtle sweetness and glossy finish.
- 10
Add the Cream and Herbs
Stir in the heavy cream and simmer for 2 more minutes. In a blender, puree the blanched mint and parsley with 1/4 cup of the sauce until smooth and bright green. Whisk this herb puree back into the main pot. The sauce should be silky, light green, and fragrant.
- 11
Make the Apricot Chutney
In a small skillet, melt 20 g butter over medium heat. Add the red onion and cook until soft, about 3 minutes. Add the diced apricots, vinegar, and honey. Simmer for 8-10 minutes until jammy and thick. This sweet-tart chutney balances the rich lamb and herbal sauce.
Carve and Serve
- 12
Slice and Plate
Remove the twine from the lamb and carve into thick medallions, about 1 inch / 2.5 cm each. Arrange on warm plates, spoon the mint velouté around the meat, and add a generous dollop of apricot chutney on the side. The contrast of smoky lamb, silky green sauce, and bright chutney is stunning.
Tips & Tricks
If your herb crust is burning before the lamb is cooked: Your grill is too hot. Lower the temperature to 180°C / 350°F and cook longer. The indirect heat should be gentle and steady, not blazing.
If your sauce turns brown instead of green: You skipped the blanching step or added the herbs to sauce that was too hot. Always blanch herbs in boiling water for 30 seconds, shock in ice water, and blend with cooled sauce before reheating gently.
If your velouté is lumpy: The stock was too cold when you added it to the roux. Always use warm stock and add it gradually, whisking constantly. If lumps form, strain the sauce through a fine mesh strainer.
If you don't have a Big Green Egg: Use a regular oven at 200°C / 390°F. You'll lose the subtle smoke flavor, but the lamb will still roast beautifully. Use a roasting pan with a rack for air circulation.
If your lamb is tough: You likely overcooked it or didn't rest it long enough. Lamb should be medium-rare (55-57°C / 131-135°F) and rested for 20 minutes minimum. Overcooking makes the proteins seize up and squeeze out moisture.
Frequently Asked Questions
Why use a velouté instead of a traditional gravy?
A velouté is lighter and cleaner than gravy. Traditional gravies use dark meat drippings and fond, which are heavy and mask delicate flavors. The velouté uses white stock and cream to stay pale and let the fresh mint and parsley shine through. It's a more refined, French approach that highlights the herbs instead of hiding them.
What does the mirin add to the sauce?
Mirin adds a subtle sweetness and a beautiful glossy finish. It's a Japanese rice wine that bridges the herbal sauce and the sweet apricot chutney, creating a modern French-Asian fusion twist. The sweetness balances the acidity of the chutney and rounds out the peppery heat in the sauce.
Why simmer the peppercorns in the stock first?
Simmering whole peppercorns releases their warmth slowly and evenly throughout the stock. This creates a gentle, rounded heat in the background instead of the sharp bite you get from ground pepper. It's a professional technique that adds complexity without overpowering the delicate mint flavor.
Is the chili crust too spicy for the delicate sauce?
No, the cream in the velouté and the sweetness of the apricot chutney temper the heat beautifully. The chili provides a warm back-note that elevates the earthy rosemary and thyme without overwhelming your palate. You can adjust the chili flakes to your preference—start with less if you're heat-sensitive.
Can I make this ahead of time?
Partially. You can make the apricot chutney up to 3 days ahead and store it covered in the fridge. The velouté can be made 1 day ahead—reheat gently and whisk in the herb puree just before serving. The lamb must be roasted fresh for the best texture and crust.
What if I don't have veal stock?
Use high-quality chicken stock instead. Veal stock is richer and more gelatinous, but chicken stock works well and is easier to find. Avoid beef stock—it's too dark and strong for this light, herbal sauce.
How do I know when the lamb is done?
Use a meat thermometer inserted into the thickest part. Pull it at 52°C / 125°F—it will rise to 55-57°C / 131-135°F during resting, giving you perfect medium-rare. If you don't have a thermometer, press the meat—it should feel like the fleshy part of your palm when you touch your thumb to your middle finger.
Can I use dried herbs instead of fresh?
Not for the crust—fresh herbs are essential for the bright, aromatic flavor and the crispy texture. Dried herbs would burn on the high heat of the grill. For the sauce, fresh mint and parsley are also critical for the vibrant green color and fresh taste.