1.Wash & clean the lamb pieces.
2. Marinate the lamb with ginger-garlic paste, salt, lemon juice, and raw papaya paste.
3. Keep aside for 30 minutes.
4. Prepare a second marinade by mixing all the other ingredients except butter.
5. Marinate the lamb cubes with this marinade and keep aside for 2 hours.
6. Skewer the lamb cubes and roast in a tandoor / oven / grill/ broiler for 15-20 minutes.
7. Remove, baste with butter and roast again for 3 - 5 minutes.
8. Remove from skewers and serve hot.