1. Prepare a charcoal fire. Soak the skewers in warm water for at least 10 minutes.
2. Meanwhile, in a small bowl, prepare the yogurt sauce and set aside.
3. Sprinkle the meat with the seasoning mix. Arrange in a dish, cover, and refrigerate for 1 hour. Thread the lamb, peppers, and onion pieces alternately onto the skewers, using about 3 pieces of the lamb for each skewer.
4. Grill the kabobs over medium-hot coals until they are cooked to the desired doneness.
5. Place the kabobs on a platter and serve with the yogurt sauce.