Soak 6-8 wooden skewers in water.
Mix the oil, ginger, chilli, garlic, lime and spices in a small blender.
Wash the prawns, remove the head and shell, leaving the tail covered (or leave them completely shelled) and put them in a freezer bag. Add the spice paste, tie the bag, and rub each prawn well with the paste, using your fingers.
Marinate for 30 minutes in the fridge.
Heat your BBQ/ Grill or griddle pan. Thread the prawns onto the pre-soaked skewers and cook them for 2-3 minutes on both sides until the prawns change colour.
Serve them warm or at room temperature with a dip of your choice.