• In a grinder or blender, add garlic, ginger, corriander/cilantro, mint, green chilli and lemon juice. Make a paste.
• In a mixing bowl add yoghurt along with all the spices and blended paste. Mix well until combined.
• Using sharp knife put deep slits on mutton leg (both sides)
• Put the mutton leg in a large tray or dish. Pour half the marinade over and rub it in. Turn over and pour the remaining marinade. Ensure that meat is covered in marinade. Cover the tray with foil and place it in refrigerator atleast 24 - 48 hrs.

Roasting

• When you are ready to roast the mutton leg, take it out of the fridge and let it be on room temperature for atleast 1 hour.
• Preheat oven at 170°C or 150℃ Fan forced.
• Put the mutton leg in foil and cover it. Keep the remaining marinade aside.
• Cut onion and garlic bulb in half. and put it in the roasting tray. Put the mutton leg over it. Pour some water in the tray. It should be just below the covered meat.
• Place the tray in the oven and cook for 2 hours.
• After 2 hours take out the tray from oven. Discard water in the tray and unwrap the mutton leg. Put it in the roasting tray and brush the prepared marinade on the side facing up. Put it back in the oven for another one hour.
• After an hour take it out again, turn the mutton leg over and brush the marinade over. And put it in the oven for another hour.
• At this stage keep checking the mutton leg after few minutes using a fork or knife. It might take 45 mins or an hour to get completely tender. keep turning the mutton leg or rotate the tray to ensure even grilling.
• Once the meat is tender, take it out. Garnish with chopped Coriander/cilantro.