Mustard Fish(Fish in mustard gravy)

Ingredients:
4 slices of fish(Rohu,Katla,Hilsa or any small fish)
2 tsp. mustard oil(vegetable oil can also be used)
1/2 tsp. turmeric powder
1/2 tsp. salt

For Gravy:
1 tsp.mustard oil
1/2 tsp. kalonji(nigella) seeds
1 onion(sliced)
2 garlic cloves(sliced)optional
1/2 tsp. turmeric
1 tbsp black mustard( soaked in water with 1/2 tsp. salt and 1 green chilly)ground to paste
2 green chilly

Method:
Marinate the fish pieces with the salt and turmeric, fry it in oil.
For the gravy,heat 1 tsp. oil in pan,add the kalonji, onion and garlic. Fry it till golden, then add the mustard paste, turmeric, salt and 1 cup of water.Add the fried fish pieces and the whole green chilly, cook for a few minutes.If you like a strong mustard oil flavour, you can add a few dropsof raw muctard oil in the end.
 Note: This dish can also be prepared without the onion and garlic, in which case the gravy is quite thick in consistency.