First wash the fish with haldi pwder and salt twice and thrice. Strain the water and marinate the fish with haldi powder, mustard oil and salt. Once it is done then keep aside. For gravy. Blend mustard seeds, gren chillies,ginger and cumin seeds. Grind it into fine paste. Once it is done then kep aside.

Heat mustard oil in a iron kadai. Fry the fish till it is light brown in colour. Once it is done then transfer to a serving plate.

In another kadai heat mustard oil. Fry cumin seeds and 1 bay leaf. Let it crackle for few minutes.Then add thee mustard paste. Saute it for few seconds. Then add the remaining masala water. Mix it well.

Add enough water. When it starts boiling. Add fried fish one by one. Cook till the fish cooked properly.Once it is done. Then transfer to a serving plate.