Make the following marinade:
7 cloves garlic, chopped
2 tsp oregano
2 tsp paprika
a little dried chilli
2 tb extra virgin olive oil
400 ml water
3 tsp salt
Heat all except water and salt together with a little extra water. Remove from heat and add water and salt.
Pour over a good leg of lamb and marinate, reserving marinade when done. Cook in a slow oven 120'C, basting regularly with reserved marinade. It will take about 2 1/2 hours.
Source: Marco