For the lamb kebabs, place the marinade ingredients into a bowl and mix until well combined. Add the lamb chunks and coat in the marinade. Cover and refrigerate for at least two hours, or preferably overnight.
Thread the marinated lamb cubes onto pre-soaked skewers with pieces of red onion and orange pepper.
Heat a griddle pan or grill until hot, then add the lamb kebabs and grill for 8 – 10 minutes, turning regularly, or until browned on all sides and cooked through.
For the raita, mix the ingredients together in a bowl.
For the spiced tomatoes, mix the ingredients together in a bowl and season with salt and black pepper.