Grind together the ingredients for making chilly paste(chilly powder, coriander powder, turmeric powder, garlic, button onions).
Grind grated coconut.
:- No need to make into a very smooth paste, grind it a bit coarsely.
To an earthen pot, add coconut oil.
Splutter mustard and fenugreek seeds.
Add sliced button onions and sautT well.
Add green chilly and saute.
Add tomato and sautT well.
Add the grinded chilly paste mixed with some water and sautT well.
Add enough water for the fish to get cooked along with salt and Kudam Puli.
Let it boil well.
Add the fish.
Cover and cook.
When the gravy is of medium consistency, add the coconut paste and mix well by rotating the pot.
Add curry leaves.
Switch off the flame as soon as the gravy starts boiling very well.
Sprinkle a tsp of coconut oil over the curry.
Garnish with lot of curry leaves.