Tel-Sorshe Pabda is a popular Bengali fish curry made with butter fish cooked in a rich and flavorful mustard sauce. The fish is marinated in a mixture of turmeric, salt, and lemon juice, then pan-fried until golden brown. The mustard sauce is made by grinding mustard seeds, green chilies, and a few other spices into a smooth paste. The fish is then simmered in the mustard sauce until cooked through, resulting in a delicious and aromatic dish.