For preparing Bengali fish fry, first grind the ingredients for grinding: ginger, cumin seeds, green chilly, garlic and dry red chilly to a smooth paste.
Mix salt and turmeric with the ground paste and rub it on the fish pieces. Marinate fish pieces for 15 minutes.
spread rava in a plate.Coat each marinated fish with rava.
Heat mustard oil in a pan and deep fry the fish pieces to a crispy golden brown color.
Dip onion rings in vinegar and keep aside.
Bengali fish fry, a yummy nutritious recipe, is ready. Serve hot with the onion rings on top.