Once the preparation is done,now heat a pot(sufuria),put oil and immediately put the onion,cook it to light brown,add in the tomato and garlic,mix well.add in the green chilli(just slit it if you want to keep it mild).mix.Now add in the coconut milk and turmeric powder and the fish PCs.let this cook on medium heat for 3 minutes.turn the fish PCs.and lower the heat.add in salt to taste.switch off after 2 minutes.before serving,put some lemon juice for additional flavour.