Drizzle a tbsp of oil in the karai,pour the blended mixture of onion,raw mango,1 tomato and some coriander in the karai or pot.mix,add in salt and turmeric powder.mix n let it cook for 2 mins.add in the thick coconut milk and mix.now add in the fish and let it cook for 5 mins,turn the fish and let it cook again for 5 mins.switch off. Garnish with coriander and green chilli