To Prep
Soak wooden skewers in water while preparing the prawns. Rinse the prawns and drain. Thread the prawns on to the skewers.
Mix all the marinade ingredients well in a bowl.
Spoon (or brush) the marinade over the prawns to coat evenly. Let stand for 20 to 30 mins.
To Cook
Preheat a lightly oiled grill. Grill the prawns over moderate heat until just cooked through, 2 to 3 mins each side. Do not overcook. Baste the prawns with any remaining sauce while grilling. You can also cook the prawns in a grill pan over medium-high heat. Garnish with spring onions or chives.