Roast Leg of Lamb with Onion Gravy and Mint Salsa Verde
Roast Leg of Lamb with Onion Gravy and Mint Salsa Verde is a medium British recipe that serves 6. 550 calories per serving. Recipe by Jamie Oliver on YouTube.
Prep: 30 min | Cook: 1 hr 45 min | Total: 2 hrs 35 min
Cost: $39.65 total, $6.61 per serving
Ingredients
- 5 lb Leg of Lamb (bone‑in, trimmed)
- 4 sprigs Rosemary (fresh)
- 3 cloves Garlic (sliced)
- 4 fillets Anchovy Fillets (thinly sliced)
- to taste Salt (sea salt)
- to taste Black Pepper (freshly ground)
- 3 pieces Onion (peeled and sliced)
- 1 tablespoon All-Purpose Flour (for gravy)
- 100 ml Red Wine (dry, for deglazing)
- 470 ml Chicken Stock (preferably low‑sodium)
- 0.5 cup Mint Leaves (packed)
- 0.5 cup Parsley (packed)
- 1 small Gherkin (finely diced)
- 1 teaspoon Capers (rinsed)
- 1 tablespoon Olive Oil (extra virgin)
- 1 teaspoon Dijon Mustard (smooth)
- 1.5 teaspoon Red Wine Vinegar (for salsa verde)
- 1 large Swede (Rutabaga) (peeled and cubed)
- 4 medium Potatoes (peeled and cubed)
- 2 tablespoons Butter (for smashing veg)
Instructions
Insert aromatics into the lamb
Using the tip of a sharp knife, make small slits in the leg of lamb where the meat shows a pink‑white seam. Insert a slice of garlic, a piece of rosemary, and a thin bit of anchovy into each slit.
Time: PT10M
Season the lamb
Rub the entire leg with sea salt and freshly ground black pepper, ensuring the seasoning reaches the inserted aromatics.
Time: PT5M
Preheat the oven
Set the oven to 180°C (350°F) and allow it to come to temperature.
Time: PT10M
Temperature: 180°C
Roast the lamb
Place the seasoned leg on the rack inside the roasting pan. Roast for 1 hour 30 minutes, basting once halfway through with pan juices.
Time: PT1H30M
Temperature: 180°C
Prepare onion mixture for gravy
While the lamb roasts, peel and halve 3 onions, then slice them thinly. Set aside.
Time: PT10M
Add aromatics to the roasting pan
After the lamb has roasted for about 30 minutes, scatter the sliced onions, any remaining garlic, rosemary, and anchovy bits into the pan. They will soak up the lamb fat and begin to caramelise.
Time: PT5M
Rest the lamb
When the lamb reaches the desired internal temperature, remove it from the oven, transfer to a cutting board, and loosely cover with foil. Let rest for 10 minutes.
Time: PT10M
Degrease the pan
Skim off excess fat from the roasting pan, leaving about 1 tablespoon of liquid and browned bits.
Time: PT5M
Make the roux
Place the roasting pan on the stovetop over medium‑high heat. Sprinkle 1 tablespoon of flour over the pan juices and stir continuously for 2 minutes until lightly golden.
Time: PT2M
Deglaze with red wine
Add 100 ml of dry red wine, stirring to dissolve the roux. Cook for 3 minutes until the wine reduces slightly and the mixture thickens.
Time: PT3M
Finish the onion gravy
Stir in 470 ml of chicken stock, bring to a gentle simmer, then reduce heat to medium‑low and cook for 10 minutes, stirring occasionally, until the gravy reaches a silky consistency.
Time: PT10M
Season the gravy
Season the gravy with additional salt and pepper if needed.
Time: PT2M
Prepare salsa verde
In a food processor, combine mint, parsley, half a garlic clove, one anchovy fillet, the diced gherkin, and capers. Pulse until finely but still rustic.
Time: PT2M
Finish salsa verde
Add 1 tablespoon olive oil, 1 teaspoon Dijon mustard, a pinch of salt and pepper, and 1.5 teaspoons red wine vinegar. Pulse briefly to combine.
Time: PT1M
Cook smashed veg
Place the cubed swede and potatoes in a pot of salted boiling water. Cook for about 20 minutes, or until fork‑tender.
Time: PT20M
Temperature: 100°C
Mash the vegetables
Drain the veg, return to the pot, add 2 tablespoons butter, and smash with a potato masher or fork until a rustic mash forms.
Time: PT5M
Plate and serve
Slice the rested lamb, arrange on a serving platter with a mound of smashed veg, drizzle salsa verde over the meat, and serve the onion gravy on the side.
Time: PT5M
Nutrition Facts
- Calories
- 550
- Protein
- 35 g
- Carbohydrates
- 30 g
- Fat
- 30 g
- Fiber
- 5 g
Dietary info: Contains gluten, Contains meat, Contains dairy
Allergens: Fish (anchovies), Dairy (butter), Mustard
Last updated: March 18, 2026






