Begun Diye Koi Macher Shorshe Jhol is a traditional Bengali fish curry made with koi fish (climbing perch) and eggplant. The curry is known for its tangy and mustardy flavors, which are derived from the use of mustard paste and tamarind pulp. The fish and eggplant are cooked in a mixture of mustard oil, mustard seeds, green chilies, and spices, resulting in a delicious and aromatic curry. This dish is typically served with steamed rice and is a favorite among Bengali seafood lovers.