Marinate the fish in salt and turmeric powder for 15 minutes.
Shallow fry the fish pieces, drain and keep aside.
Grind the coriander leaves, garlic and green chillies.
Heat oil, add masala paste and fry till the oil separates out.
Add tomatoes, methi seeds and powder masalas and fry till the oil begins to float on top.
Add about 1 cup water. Bring the gravy to a boil.
Add the fish slices and cook for 10 minutes.
Serve fish curry hot.