Cut fish into large cubes. Add salt and tumeric and rub well on the fish cubes.
Grate the garlic, finely chop the shallot and tomatoes.
Cut the chillies in half, roughly chop the corriender leaves.
Heat the pan, add oil then add shallots and garlic and saute till the colour changed into light brown.
Add the tomatoes and stir for few seconds, sprinkle salt and saute till the oil come to the surface.
Pour half cup of water, mix the paste well bring it to simmer and add the marinated fish.
Close the lid and simmer for 2-3 miins. Gently stir and turn side to prevent fish from breaking.
Add coriander chopped, chillies and fish sauce. Add some more water if the curry paste is too thick.
Close lid and continue simmer for 2-3 mins.
Once cooked remove from pan immediately and put in serving plate.
Garnish with fresh coriander leaves and sliced chillies.
Serve with steamed rice! Enjoy!