For preparing Kerala Style Fish Curry (Naadan Meen Curry), first clean the fish and cut into small pieces.
Chop small onion and tomatoes.
Roast turmeric powder, chilli powder, coriander powder, pepper powder and fenugreek powder together in a pan on low flame without oil to remove the raw smell and taste of these powders.
Heat oil in a pan (traditional `meen chatti` is the best).
Add mustard seeds along with ginger-garlic paste.
When the ginger garlic paste is fried, add chopped small onion and saute till it becomes very soft.
Add chopped tomatoes and mix it well.
When the mixture reaches the consistency of a curry paste, add the roasted masala powder along with kudam puli, salt and required quantity of water and bring it to boil.
Now add the fish pieces and mix it well.
Cover it with a lid and cook it on a medium flame until the dish reaches the correct consistency (not too watery or too thick).
:- Serve Kerala Style Fish Curry hot with kappa vevichathu or plain rice.