Bash up your lemon grass and mix it with the soy sauce, coriander stalks, ginger and garlic then rub all over the salmon fillet. Leave it to marinate for an hour or so, either in a plastic bag or on a tray covered with cling film.
Preheat your grill to its highest setting. When you’re ready to cook the salmon, remove it from the marinade, brush with honey and grill for 10 minutes.
Fork up the cooked salmon a little so everyone can see the lovely, dark, sticky outside and the juicy, pink fish underneath. Serve sprinkled with the chillies, spring onions, reserved coriander leaves, then squeeze over the lime.