Ilish Machher Paturi, also known as Hilsha Fish Cooked in Banana Leaves, is a traditional Bengali delicacy. The fish is marinated in a flavorful mixture of mustard paste, yogurt, and spices, then wrapped in banana leaves and steamed or grilled. The banana leaves impart a unique aroma and flavor to the fish, while keeping it moist and tender. This dish is rich in omega-3 fatty acids and is best served with steamed rice.