Combine the spices with the oil, lemon juice, tomato purée, coriander, salt and pepper in a large mixing bowl until smooth. Add the lamb pieces, mix well with your hands to coat evenly in the spice mixture.
Cover and chill for at least 45 minutes. When ready to cook, remove from the fridge and preheat the grill to hot. Thread evenly onto the wooden skewers and grill for 12-14 minutes, turning occasionally, until cooked. Remove and allow to rest for a few minutes before serving.
For top tips on protecting you and your family when preparing raw meat and poultry, visit Food Safety in the Home and view the full Food safety at home video.