Exotic Barbecued Lamb

1 Leg of Lamb, bone removed and butterflied 
2 medium onions, chopped 
2-3cm piece of fresh ginger, peeled and grated 
5-7 cloves garlic, crushed 
150ml lemon juice 
1 tablespoon ground coriander 
1 teaspoon ground cumin 
1 teaspoon garam masala 
1 teaspoon turmeric 
1/4 teaspoon mace (optional) 
1/4 teaspoon nutmeg 
1.2 teaspoon cinnamon 
1.4 teaspoon cloves 
175ml olive oil 
2 1/2 teaspoon salt 
1/4 teaspoon black pepper 
1/2-1 teaspoon cayenne 

Pour all the ingredients in a blender or food processor, and blend until smooth. 
Pour over a butterflied leg of lamb, cover and chill for 24-48 hours, turning occasionally. 
Grill on the barbecue for 1-1/2 hours, and rest a few minutes before slicing. 

Serve with a wild rice salad. 

Serves 6