Posto bata macher jhol is a traditional Bengali fish curry made with a rich and creamy poppyseed paste. The fish is marinated in a blend of spices and then cooked in a flavorful curry made with onions, tomatoes, and the poppyseed paste. The dish has a unique nutty flavor from the poppyseeds and is best enjoyed with steamed rice. Posto bata macher jhol is a popular dish in Bengali households and is often served during special occasions.