Roasted Leg Lamb Potatoes

A perfectly roasted leg of lamb with herb crust, served alongside golden, crispy potatoes on a festive platter. Save
A perfectly roasted leg of lamb with herb crust, served alongside golden, crispy potatoes on a festive platter. | recipesbyleticia.com

This dish features a bone-in leg of lamb, infused with fresh rosemary, thyme, garlic, and lemon zest. The meat is roasted alongside waxy potatoes and yellow onions, basted with pan juices for enhanced flavor. Starting with a high-temperature roast and then lowering the heat ensures a tender, medium-rare finish. Resting before carving preserves juices. Perfect for celebratory dinners or Sunday meals, this preparation balances robust herbs and slow roasting for a memorable centerpiece.

The whole house fills with this impossible to describe aroma when this lamb is roasting, something between rosemary and garlic that makes everyone drift into the kitchen asking whats for dinner hours before it is ready.

I made this for Easter last year and my usually quiet brother actually asked when I was making it again before he even finished his first plate.

Ingredients

  • Leg of lamb (bone in): The bone adds so much flavor and keeps the meat moist during roasting
  • Garlic slices: Tucking these into small incisions distributes garlic flavor throughout the meat
  • Fresh rosemary and thyme: Do not substitute dried herbs here, fresh makes all the difference
  • Lemon zest: This brightens everything and cuts through the richness
  • Waxy potatoes: These hold their shape better than russets and get creamy inside, crispy outside
  • White wine and stock: Create the most incredible pan juices for basting and serving

Instructions

Preheat and prep the meat:
Get your oven to 200°C (400°F) and pat the lamb completely dry with paper towels so the herb rub will stick properly.
Make garlic pockets:
Use a sharp knife to cut small slits all over the lamb and tuck a garlic slice into each one, pushing them in deep.
Mix the herb rub:
Combine the rosemary, thyme, salt, pepper, olive oil, and lemon zest in a small bowl until it forms a paste.
Season generously:
Rub that herb mixture all over the lamb, getting it into every crevice, covering the entire surface.
Arrange the vegetables:
Scatter those thick onion slices across the bottom of your roasting pan and nestle the potatoes around the edges.
Position the lamb:
Set the seasoned lamb right on top of the onion bed so it is elevated above the potatoes.
Add the liquids:
Pour in the wine and stock, being careful not to wash the herb crust off the meat itself.
Initial high heat:
Roast uncovered at 200°C for 20 minutes to get that crust started and seal in the juices.
Lower and slow:
Reduce the oven to 180°C (350°F) and roast for another 1 hour 20 minutes, about 20 minutes per pound for medium rare.
Flip the potatoes:
Halfway through cooking, give those potatoes a stir so all sides get golden and crispy.
Baste as you go:
Spoon those pan juices over the lamb every 20 minutes or so to keep everything moist and flavorful.
Check doneness:
Use a meat thermometer to check for 55 to 60°C (130 to 140°F) in the thickest part for medium rare.
Rest the meat:
Let it sit under foil for 15 minutes before carving, otherwise all those juices will run out onto the cutting board.
Golden potatoes and sliced onions roasted beside a tender leg of lamb, resting with pan juices for serving. Save
Golden potatoes and sliced onions roasted beside a tender leg of lamb, resting with pan juices for serving. | recipesbyleticia.com

Something magical happens when you bring a whole roasted leg of lamb to the table, people just gather around like it is a holiday even when it is just a regular Tuesday.

Getting That Perfect Crust

The high heat start is what creates that gorgeous herb crust everyone fights over, so do not be tempted to skip the 20 minutes at 200°C.

Making Ahead

You can rub the lamb with the herb mixture the night before and let it sit in the refrigerator, which makes the flavor even deeper and more pronounced.

Serving Suggestions

A simple green salad with a sharp vinaigrette cuts through the richness perfectly.

  • Steamed green beans with butter finish the plate beautifully
  • Crusty bread is essential for sopping up those pan juices
  • A bold red wine like Bordeaux or Syrah really ties everything together

Herb-crusted leg of lamb carved with a sharp knife, served with roasted potatoes and onions for a family dinner. Save
Herb-crusted leg of lamb carved with a sharp knife, served with roasted potatoes and onions for a family dinner. | recipesbyleticia.com

There is something so satisfying about carving this at the table and watching everyone reach for their favorite pieces.

Common Questions

Make small incisions in the lamb and insert sliced garlic. Then rub the leg with a mix of rosemary, thyme, salt, pepper, olive oil, and lemon zest for deep flavor infusion.

Roast first at 200°C (400°F) for 20 minutes, then reduce to 180°C (350°F) and continue for about 1 hour 20 minutes, based on weight. Rest the meat for 15 minutes before carving.

Place thickly sliced onions at the base of the pan, surround with quartered waxy potatoes, and place the lamb on top to allow flavor melding and even roasting.

Yes, marinating the lamb overnight in the herb and oil mixture enhances flavors and tenderizes the meat further.

A robust red wine such as Bordeaux or Syrah complements the rich, herbaceous flavors of the roasted lamb and potatoes.

If the potatoes brown too fast during roasting, cover them loosely with foil to ensure even cooking without burning.

Roasted Leg Lamb Potatoes

Herb-crusted leg of lamb roasted with potatoes and onions delivers tender, flavorful main dish.

Prep 20m
Cook 100m
Total 120m
Servings 6
Difficulty Medium

Ingredients

Meat & Marinade

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

Vegetables

  • 3.3 lb waxy potatoes, peeled and quartered
  • 2 large yellow onions, thickly sliced

For Roasting

  • ⅔ cup dry white wine
  • ⅔ cup chicken or vegetable stock

Instructions

1
Preheat Oven: Preheat your oven to 400°F.
2
Prepare the Lamb: Pat the leg of lamb dry. Using a sharp knife, make small incisions all over the meat and insert garlic slices.
3
Make Herb Rub: In a small bowl, mix rosemary, thyme, salt, pepper, olive oil, and lemon zest. Rub this mixture over the entire lamb.
4
Arrange Roasting Pan: Scatter the onions over the base of a large roasting pan. Arrange the potatoes around the sides. Place the lamb on top of the onions.
5
Add Liquid: Pour the white wine and stock into the pan, avoiding direct contact with the lamb's crust.
6
Initial High-Heat Roast: Roast uncovered for 20 minutes at 400°F.
7
Continue Roasting: Reduce oven temperature to 350°F and continue roasting for about 1 hour 20 minutes (approximately 20 minutes per pound) for medium-rare, turning the potatoes once or twice for even browning.
8
Baste and Monitor: Baste the lamb with pan juices halfway through roasting. If potatoes brown too quickly, shield them with foil.
9
Rest the Meat: Once the lamb reaches your desired doneness (internal temp 130–140°F for medium-rare), remove from oven. Cover loosely with foil and rest for 15 minutes.
10
Carve and Serve: Carve the lamb and serve with roasted potatoes and onions, spooning over pan juices.
Additional Information

Equipment Needed

  • Roasting pan
  • Sharp carving knife
  • Meat thermometer
  • Basting brush or spoon
  • Cutting board

Nutrition (Per Serving)

Calories 620
Protein 54g
Carbs 38g
Fat 26g

Allergy Information

  • Double-check stock and wine labels for gluten or sulfite content if sensitive.
Leticia Fernández

Sharing easy, flavorful meals and practical cooking tips for home cooks and food lovers.