- Blitz the coriander stems, white pepper, cumin seeds, garlic, turmeric and sugar in a blender until it forms a paste. Don't blend too much it's preferable if a little lumpy.
- Mix in the fish sauce and coconut milk.
- Cover the skewers with the marinade and refrigerate for 2 - 4 hours.
- Take them out for half an hour before cooking; barbecue for 10 minutes until the meat is white throughout.
Tip: Pre-marinade the chicken in coconut milk for a more distinctive flavour.