Mix all the ingredients together for the marinade put the fish in and pop in the fridge for 2 hours. Place the onions and cashews in a pan and cook for 5 minutes add all the rest of the ingredients and gently simmer for 10 minutes.

Meanwhile heat a grill to high put the fish on a tray and grill for 8 minutes until charred. Blanch the veg for 2 minutes and drain.To serve spoon the sauce onto a platter top with fish and veg.