Place the lamb mince in a large bowl. Place the onions and garlic in a food processor and blitz until very finely chopped, then add to the lamb mince. Add the chilli if using, the dried herbs and salt and pepper. Mix the ingredients until thoroughly combined, then place in the refrigerator for at least 30 minutes.
When ready to cook, heat a griddle pan (or barbecue) until smoking hot. Oil your hands to prevent the mixture sticking, then form equal amounts of the mixture around eight skewers. (If wooden, soak them for 15 minutes in water to prevent burning). Brush the kebabs with oil, then lay on the griddle and cook for 8-10 minutes or until just cooked through.
Serve alongside the yogurt.
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.