1 leg of lamb (about 4 kg) butterflied and slightly pounded
2 onions, 6 garlic cloves, 3 inch piece of ginger - ground to a paste
3/4 c lemon juice
1/4 tsp each of ground cinnamon, cloves, nutmeg, black pepper powder
2 1/2 tsp salt
1 tsp each of red chilli powder, ground cumin, tumeric, garam masala powder
1 tbsp ground coriander powder
1 c olive oil
Method
Trim the fat off the meat and with the tip of a knife make diagonal cuts on it on both sides.
Mix the remaining ingredients together and marinate the meat in this mixture, rubbing the marinade well into the gashes. Cover and refrigerate for 6-8 hours or overnight.
Place the meat on the grill. First let it sear for about 5 minutes on either side and then let it cook for another 45 minutes brushing with marinade and turning frequently. The meat will be dark on the outside and pinkish inside.