As t was a kit it came with brown mustard seeds, curry leaves and a dried red chilli. Fry that in hot oil for 20secs and then put in the spiced coconut mix and add a spot of water. Put the frozen white fish in (I had let it defrost in fridge so I could rub some turmeric on) and simmer till fish cooked.
I have done this from scratch before using my own spices, nice and flavoursome with a good heat.