First, marinate the Bata fishes with half a spoonful of salt and turmeric. The fish should be slit and then kept for 10 minutes.
Then fire up the earthen stove, heat up the kadai, and pour some oil.
Let the oil heat up, add the Bata fishes to the hot oil. Fry until it’s brown and crispy. Once Bata fishes are fried, then take them out.
Add the black cumin and then the onion. Fry it lightly for 5 minutes until it’s light brown.
Add the all green chilis and half a spoonful of salt. Add the ginger and garlic paste. Fry it for 5 minutes without water.
Add the turmeric and a little bit of water. Cook it well for 5 minutes.
Now add some water according to desired consistency for the gravy and cover it with a lid.
Then add the coriander powder and mix well.
When the spicy gravy starts to boil, add all the fried Bata fish pieces and a pinch of salt.
After 5 minutes, Bata Macher Jhal is ready. Serve it hot with steamed rice.