Marinade Rohu fish with turmeric and salt for 10 minutes.

Then, heat oil in a kadai and fry this marinated fishes.

Take another pan and heat oil in it. Saute cumin and chopped onion in the pan until brown.

Add chopped tomatoes and cook till oil seperates.

Add the cumin powder, red chilli powder,garam masala powder and kasuri methi. Mix it thoroughly.

Mix curd in it and cook till oil seperates. Then mix fried fish with it and can mix little water if reqire.

Cook for 10 to 15 minutes in low flame. Remove from flame after a thick gravy and fish nicely coated with gravy masala.