Place all the marinade ingredients in a food processor – or use a hand blender – and blend until smooth. Pour the mixture into a bowl.
Slice each chicken breast into four strips and add to the bowl, mixing well to ensure they are all completely coated with the marinade. Leave in the fridge to marinate for up to 3 hours (and for at least 30 minutes).
Preheat the grill to high. Brush a baking tray with vegetable oil.
Carefully thread each chicken strip onto a skewer, lining up the skewers on the baking tray.
Grill the skewers for about 10 minutes, turning occasionally, until golden and cooked through and starting to crisp. Garnish with coriander and serve.
