Roasted Leg Lamb Mint Sauce

Sliced Roasted Leg of Lamb with Mint Sauce rests on a platter beside fresh rosemary and vibrant mint garnish for a festive roast. Save
Sliced Roasted Leg of Lamb with Mint Sauce rests on a platter beside fresh rosemary and vibrant mint garnish for a festive roast. | quickpinkitchen.com

This dish highlights a bone-in leg of lamb seasoned with garlic, rosemary, thyme, and olive oil, slow-roasted until juicy and tender. Accompanied by a bright, zesty mint sauce made from fresh mint, sugar, white wine vinegar, and a pinch of salt, it delivers a perfect balance of flavors. Served with roasted carrots, potatoes, and parsnips, this meal is ideal for festive gatherings or special Sunday lunches, combining rich meatiness with refreshing herbal notes.

The first time I attempted leg of lamb, I was hosting Easter dinner for my in-laws. My mother-in-law, who grew up on a farm in Yorkshire, watched me make those tiny garlic slits with such concentration that I started sweating. When she took her first bite and closed her eyes for a full three seconds, I knew I had something worth keeping.

Last Christmas, my brother-in-law who swears he hates lamb went back for thirds. He kept slicing off just a little more while standing by the carving board, pretending he was just testing the carving knife. Sometimes the best reviews come from people who dont even realize theyre enjoying themselves.

Ingredients

  • Leg of lamb: Bone-in gives you better flavor and helps the meat cook evenly, plus the presentation is stunning
  • Garlic cloves: Tucking these into small incisions means roasted garlic flavor in every bite
  • Fresh rosemary and thyme: Woodsy herbs that pair perfectly with lambs natural sweetness
  • Olive oil: Helps that herb rub cling to the meat and promotes beautiful browning
  • Coarse sea salt: The larger crystals dissolve slowly during roasting for seasoned flavor throughout
  • Fresh mint leaves: Growing your own mint makes all the difference, and you will need plenty
  • White wine vinegar: Adds the necessary acid that cuts through the rich meat

Instructions

Prep your oven and lamb:
Preheat to 200°C and use a sharp knife to make small incisions all over the lamb, tucking a garlic slice into each one.
Create the herb rub:
Mix olive oil, chopped rosemary, thyme, salt and pepper in a small bowl until combined.
Season and position:
Rub the herb mixture thoroughly over the lamb and place on a rack in a roasting pan.
Roast to perfection:
Cook for about 1 hour 30 minutes for medium-rare, basting once or twice with pan juices.
Prepare the mint sauce:
Combine chopped mint and sugar in a heatproof bowl, pour over boiling water, and let stand 5 minutes before stirring in vinegar.
Rest before carving:
Transfer the lamb to a carving board, cover loosely with foil, and let rest 15 minutes before slicing.
A platter of Roasted Leg of Lamb with Mint Sauce shows golden, herb-crusted slices and a rich, green mint sauce in a small bowl. Save
A platter of Roasted Leg of Lamb with Mint Sauce shows golden, herb-crusted slices and a rich, green mint sauce in a small bowl. | quickpinkitchen.com

There is something profoundly satisfying about carrying a whole roasted leg to the table, the aroma filling the room before you even set down the platter. My grandmother believed that presentation was half the meal, and watching guests lean in when that dish arrives proves her right every time.

Timing Is Everything

I have learned that pulling the lamb out 5 degrees before your target temperature is the smart move. The residual heat during resting completes the cooking process, and you will end up with perfectly pink meat instead of accidentally overdone center.

The Mint Sauce Secret

Boiling water is crucial here; it softens the raw mint and dissolves the sugar properly, mellowing everything into a cohesive sauce. Make it at least an hour before serving so the flavors can marry and develop.

Carving With Confidence

Let the meat rest, then use a sharp carving knife and slice against the grain into thin, even pieces. This keeps each bite tender rather than chewy.

  • Warm your serving platter in the oven while the lamb rests
  • Save those pan juices to drizzle over the sliced meat
  • Extra mint sauce keeps for weeks in the refrigerator
Roasted Leg of Lamb with Mint Sauce is served medium-rare with roasted vegetables, showcasing juicy, tender meat perfect for a Sunday dinner. Save
Roasted Leg of Lamb with Mint Sauce is served medium-rare with roasted vegetables, showcasing juicy, tender meat perfect for a Sunday dinner. | quickpinkitchen.com

There is quiet joy in a Sunday roast that brings everyone to the table, conversations flowing alongside good food. Some traditions persist for good reason.

Recipe FAQs

Allow the lamb to rest covered with foil after roasting for at least 15 minutes; this helps juices redistribute and keeps the meat tender.

Roast the leg until its internal temperature reaches about 60°C (140°F). Using a meat thermometer ensures perfect doneness.

Yes, the mint sauce can be made a few hours in advance and kept chilled to let flavors meld beautifully before serving.

Roasted root vegetables like carrots, potatoes, and parsnips complement the rich lamb and fresh mint flavors well.

Adding a splash of lemon juice brightens the mint sauce, balancing the sweetness and acidity for a more vibrant taste.

Roasted Leg Lamb Mint Sauce

Tender leg of lamb roasted with herbs, served alongside a refreshing mint sauce and roasted vegetables.

Prep 20m
Cook 90m
Total 110m
Servings 6
Difficulty Medium

Ingredients

Lamb

  • 1 (4.5-5.5 lb) bone-in leg of lamb, trimmed
  • 4 garlic cloves, sliced
  • 2 tbsp fresh rosemary, chopped
  • 2 tbsp fresh thyme leaves
  • 2 tbsp olive oil
  • 1 tbsp coarse sea salt
  • 1 tsp freshly ground black pepper

Mint Sauce

  • 1 cup fresh mint leaves, finely chopped
  • 2 tbsp caster sugar
  • 1/2 cup boiling water
  • 4 tbsp white wine vinegar
  • Pinch of salt

To Serve

  • Roasted vegetables (carrots, potatoes, parsnips)

Instructions

1
Preheat Oven: Preheat your oven to 400°F.
2
Prepare Lamb: Use a sharp knife to make small incisions all over the lamb. Insert a slice of garlic into each incision.
3
Season Lamb: In a small bowl, mix olive oil, rosemary, thyme, salt, and pepper. Rub this mixture thoroughly over the lamb.
4
Roast Lamb: Place the lamb on a rack in a roasting pan. Roast for about 1 hour 30 minutes for medium-rare (internal temp 140°F), basting once or twice.
5
Prepare Mint Sauce: Place the chopped mint and sugar in a heatproof bowl. Pour over the boiling water, stir, and let stand for 5 minutes. Stir in the vinegar and a pinch of salt. Adjust seasoning to taste.
6
Rest Lamb: Once the lamb is done, transfer to a carving board. Loosely cover with foil and let rest for 15 minutes before carving.
7
Serve: Serve the lamb sliced, accompanied by the mint sauce and roasted vegetables.
Additional Information

Equipment Needed

  • Roasting pan with rack
  • Sharp knife
  • Small mixing bowls
  • Carving board
  • Basting brush (optional)

Nutrition (Per Serving)

Calories 520
Protein 58g
Carbs 7g
Fat 28g

Allergy Information

  • This recipe is naturally gluten-free. Check vinegar and other packaged ingredients for hidden gluten or allergens if you have sensitivities.
Lindsay Harper

Passionate home cook sharing easy, wholesome recipes and helpful kitchen tips for everyday meals.