Parshe jhal, also known as mullets in mustard sauce, is a popular Bengali fish curry. The dish features tender mullet fish cooked in a tangy and spicy mustard sauce. The mustard sauce is made by grinding mustard seeds with other spices and then cooked with onions, garlic, and tomatoes. The fish is then simmered in this flavorful sauce until it is cooked through and infused with the rich flavors. Parshe jhal is best enjoyed with steamed rice or roti, making it a delicious and satisfying meal.