Step 1

Preheat the oven to 200C/400F

Step 2

In a mortar combine chopped rosemary leaves, crushed garlic, coarse salt, lemon zest and olive oil. Bash it with a pestle till rosemary and lemon zest release their oils and the mixture resembles a paste.

Step 3

Rub the mixture all over the leg and roast in the preheat oven for 1 hour 15 minutes for a medium-rare and 1 hour 30 minutes for a well done roast.

Step 4

Put mint, sugar, salt, water, white wine vinegar and olive oil in a food processor and blend until smooth.

Step 5

When your roast is cooked take it out of the oven and loosely cover it with aluminum foil. Allow it to rest for 20 minutes before cutting it.