Cook for a minute or two longer until the sauce is syrupy. Serve the salmon skin-side up with a little sesame oil drizzled over, the sauce spooned over and couscous on the side.
Keeping the salmon in the pan, drain the oil from the pan and add the balsamic vinegar and cook for two minutes. Finally add the honey and the sesame seeds. Remove the salmon from the pan.
Whisk all the marinade ingredients together in a bowl. Sit the salmon in a flat dish, pour over the marinade and allow to sit for at leat 15 minutes and up to 24 hours. Next steam the coconut rice.