720ml(3 cups) hot vegetable stockfrom your boiled/steamed vegetables and potatoes
¼tspsalt
¼tspblack pepper
2tbspcornflour/cornstarch
5tbspcold water
Instructions
Remove the lamb from the fridge about an hour before cooking – to allow it to come up to room temperature.
2 kg (4.4 lbs) leg of lamb
Preheat the oven to 180C/350F (fan).
Mix together the olive oil, garlic salt, salt, pepper, rosemary, thyme, and lemon zest to form a thick paste.
1 tbsp olive oil, ½ tsp garlic salt, ½ tsp Maldon salt, ½ tsp black pepper, 1 tsp dried rosemary, 1 tsp dried thyme, finely grated zest of 1 lemon
Spread the paste all over the lamb.
Place the lamb in a large roasting tin and place in the oven. Cook for 2 hours (this will cook it to medium).
Remove from the oven and place on a warm plate to rest for 30 minutes.
To make the gravy, place the roasting tin on the hob (or transfer the meat juices to a saucepan – be sure to scrape up any bits from the tin – that’s where all the flavour is).
Stir together whilst pouring in the hot vegetable water. Bring to the boil and lightly season with salt and pepper.
720 ml (3 cups) hot vegetable stock, 1/4 tsp salt, 1/4 tsp black pepper
Stir in the cornstarch slurry using a whisk, until the gravy thickens. Allow to bubble then turn off the heat.
2 tbsp cornflour/cornstarch, 5 tbsp cold water
Serve the roast lamb with the gravy, mint sauce, roast potatoes, carrots and green veg - such as green beans or sprouts.
Video
Notes
The Lamb:
Go for grass-fed lamb for the absolute best flavour. You're looking for a lamb leg with a layer of fat on the outside, and lightly marbled with fat on the inside.Welsh lamb is my favourite, but New Zealand lamb is great too.
Different lamb leg size?
Here are the recommended cooking times for full leg and half leg joints:Medium: Cook for 25 minutes per 500g (1.1lbs), plus an extra 20-25 minutes at 180C/350F - until the internal temperature of the lamb is 60C.Well done: Cook for 30 minutes per 500g (1.1lbs), plus an extra 25-30 minutes at 180C/350F - until the internal temperature of the lamb is 70C.
Nutritional information is per serving including gravy.