Preheat the oven to 200C/400F/Gas 6.
Place the lamb, spices and apple into a food processor and blend to combine. Season with salt and freshly ground black pepper.
Using your hands, shape the mixture into two balls.
Heat the butter in an ovenproof frying pan and cook the koftas, turning frequently, until browned all over.
Transfer to the oven and bake for 6-8 minutes, or until the koftas are completely cooked through.
To serve, thread the koftas onto a skewer.