Wash the fish with luke warm water.Marinate with 1 tsp of salt and a pinch of turmeric powder.Keep aside.
Grind Tomato and Onion to a paste.To this add ginger,chilly,Turmeric,cumin and Coriander Powder. Keep the masala mix aside.
Heat oil in a frying pan.Fry the fish pieces very lightly on both sides.Take out from the oil, and keep on a kitchen tissue to soak excess oil.
Add Bay leaves in the remaining oil.Stir fry for 30 secs.Add the masala mix and 1/2 cup of water.Saute on slow flame till oil separates.
Add 2 cups of water and bring to boil.Add the fried fish,salt and slit green chills.Simmer for 7 to 8 minutes.When the gravy starts thickening , remove pan from the heat, cover and give 10 minutes standing time.