Roast Lamb with Duck Fat Potatoes, Braised Asparagus and Pan Gravy

Garlic and Rosemary Roast Lamb

An initial hot roast browns the outside, followed by gentler heat to cook the center evenly. Resting before carving keeps the slices juicy and supplies flavorful juices for the gravy.

Ingredients

• 2½ lb boneless leg of lamb, tied into an even roast
• 11 g kosher salt
• 1 tsp freshly ground black pepper
• 4 cloves garlic, finely grated
• 1 tbsp finely chopped rosemary leaves
• 1 tbsp olive oil

Instructions

1. Pat the lamb dry and season all over with the salt. Refrigerate uncovered overnight if possible, or season while preparing the other ingredients.
2. Heat the oven to 425°F. Mix the pepper, garlic, rosemary and olive oil, then rub over the lamb.
3. Set the lamb fat-side up on a small rack in a flameproof roasting pan. Roast for 20 minutes, then reduce the oven to 350°F.
4. Continue roasting for approximately 40–70 minutes, checking the thickest part with a thermometer after 35 minutes. If the pan drippings begin to scorch, add a splash of water.
5. Remove the lamb at about 140°F and rest loosely tented for 25 minutes. Verify that carryover cooking brings the center to 145°F and holds it there for at least 3 minutes; if it does not, return the roast to the oven briefly before resting again.
6. Reserve the pan drippings and resting juices for the gravy. Remove the string and carve the lamb across the grain into ¼-inch slices.

Notes

• Roast shape matters more than weight alone; use the thermometer rather than the clock to determine doneness.

Lamb Pan Gravy

Deglazing captures the browned roasting juices, while a small amount of arrowroot gives the gravy enough body to cling to the sliced lamb without becoming heavy.

Ingredients

• reserved lamb pan drippings and resting juices
• 1½ cups gluten-free unsalted lamb or chicken stock
• 1 tsp arrowroot starch
• 1 tbsp cold water
• 1 tsp red wine vinegar, plus more to taste
• to taste kosher salt and freshly ground black pepper

Instructions

1. Pour the roasting-pan juices into a small jug and spoon off most of the fat. Leave the browned deposits in the roasting pan, discarding any blackened bits.
2. Set the pan over medium heat, add the stock and scrape up the browned deposits. Transfer to a small saucepan if the roasting pan is not stovetop-safe.
3. Add the defatted drippings and simmer for 8–12 minutes, until reduced to about 1 cup. Add the lamb's resting juices as they collect.
4. Mix the arrowroot with the cold water. Stir half the slurry into the gently simmering gravy, adding the remainder only if needed for a light coating consistency. Heat briefly until glossy, then remove from the heat.
5. Stir in the vinegar and season with salt and pepper. Strain for a smooth finish.

Notes

• If too thick or salty, loosen with water or unsalted stock. Avoid prolonged boiling after adding arrowroot.

Duck Fat Roast Potatoes

Parboiling gives the potatoes creamy centers, while steam-drying and a final hot roast create the deeply browned cut faces and crisp skins.

Ingredients

• 2 lb small Yukon Gold potatoes, skin on, halved or quartered into 1½-inch pieces
• 4 tbsp duck fat, melted
• 1 tsp kosher salt, plus more for the boiling water
• ½ tsp freshly ground black pepper

Instructions

1. Put the potatoes in a saucepan, cover with cold water and salt the water generously. Bring to a boil, then simmer for 8–12 minutes, until the outside is tender but the pieces still hold their shape.
2. Drain thoroughly and let steam-dry for 5 minutes. Shake the colander gently to roughen the cut edges without breaking the potatoes.
3. Toss with the duck fat, measured salt and pepper. Spread on a heavy rimmed sheet pan in a single layer, placing a cut face against the pan.
4. Place in the 350°F oven alongside the lamb for its final 30 minutes of roasting.
5. When the lamb comes out, increase the oven to 450°F. Turn the potatoes and roast for another 20–30 minutes, until deeply golden, crisp outside and completely tender inside.
6. Taste for salt and serve promptly.

Notes

• For a potato-only preparation, roast at 425°F for about 40–50 minutes after parboiling, turning once.

Lemon-Braised Asparagus

A shallow, covered braise makes thick asparagus tender without drying the tips. Reducing the liquid around the spears leaves a light glaze, sharpened with lemon at the end.

Ingredients

• 1½ lb medium-thick asparagus
• 2 tbsp olive oil
• ½ cup gluten-free unsalted chicken stock or water
• 1 clove garlic, lightly crushed
• ¼ tsp kosher salt, plus more to taste
• 2 tsp fresh lemon juice
• to taste freshly ground black pepper

Instructions

1. Trim the woody asparagus ends. Peel the lower third of very thick stalks so they cook evenly.
2. Arrange the asparagus in a wide skillet with the olive oil, stock, garlic and salt. Bring to a simmer over medium heat.
3. Cover and braise gently for 6–9 minutes, turning the spears once, until a knife enters the lower stalk with slight resistance.
4. Uncover and simmer for 2–4 minutes, until the asparagus is tender but intact and the liquid has reduced to a shallow glossy coating. Add a splash of water if the pan dries before the stalks are tender.
5. Discard the garlic. Add the lemon juice and pepper, roll the spears through the juices and adjust the salt.

Notes

• Thin asparagus may need only 3–5 minutes covered; check early to protect the tips.

Overall Timing / Workflow

The lamb's resting window provides the high-heat finish for the potatoes and enough time to make the gravy and braise the asparagus.

Instructions

1. The night before, salt the lamb and refrigerate uncovered if convenient.
2. About 2 hours before serving, heat the oven, rub the lamb with its aromatics and begin roasting.
3. While the lamb roasts, trim the asparagus, cut the potatoes and measure the gravy ingredients.
4. When the lamb reaches approximately 110–115°F, parboil and steam-dry the potatoes, then put them in the 350°F oven. Aim to give them about 30 minutes alongside the lamb, adjusting to the roast's actual progress.
5. When the lamb reaches its pull temperature, transfer it to a board and increase the oven to 450°F for the potatoes.
6. During the lamb's rest, make the gravy and braise the asparagus. Verify the lamb's final temperature, then carve just before serving.
7. Serve when the potatoes are crisp, the gravy is hot and the asparagus is freshly glazed.

Notes

• If the lamb finishes early, let it rest longer rather than rushing the potatoes. Keep the gravy warm over very low heat.

Plating

Keeping the three elements distinct preserves the potatoes' crispness and makes the sliced lamb and glossy asparagus the focus.

Instructions

1. Use warmed plates or a large serving platter. Fan the lamb slices across one side and spoon a little gravy over the meat.
2. Arrange the asparagus in a parallel bundle beside the lamb and spoon its reduced braising juices over the stalks.
3. Pile the potatoes alongside, keeping most of them clear of the gravy so their browned surfaces stay crisp.
4. Pass the remaining gravy separately.

Leftover Path

Separate storage lets the lamb reheat gently while the potatoes regain their crisp edges. The asparagus is best warmed briefly or served at room temperature.

Instructions

1. Refrigerate the lamb, gravy, potatoes and asparagus in separate covered containers within 2 hours. Use within 3–4 days.
2. Re-crisp the potatoes on a sheet pan at 425°F for 12–18 minutes.
3. For hot leftovers, warm sliced lamb gently in covered gravy until it reaches 165°F; avoid hard boiling, which will toughen the slices.
4. Warm the asparagus briefly in a covered skillet with a splash of water, or chop it and serve with cold sliced lamb and potatoes reheated separately.