Mix the mince, onion, scallions, chilli oil (if using) and seasoning well together. With wet hands shape the mixture onto 4 skewers and grill or barbecue for 5-6 minutes on each side until fully cooked. To make the Avocado Dressing: Place all the ingredients in the processor and whiz for a few seconds. Very good served with grilled kofta or burgers.
Serve the koftas with salad leaves, rice and the avocado dressing