Mince the onion, chillies, garlic, ginger, coriander and mint leaves together. Mix with all the above ingredients and knead to smooth mixture. warm the skewers, then rub them with a few drops of melted ghee. spread a little of the mixture on the palm of your hand, then pierce the skewer through its center Arrange the keema rings in rows on each skewer. Brush with melted ghee on all sides of the rings and grill over on open fire, brushing frequently with ghee until the kababs are cooked to a beautiful golden color. Remove on to a plate and serve with mint chutney, onion rings and lime wedges.