Katla Kalia is a traditional Bengali fish curry made with Katla fish, a popular freshwater fish in Bengal. The fish is marinated in a blend of spices and then cooked in a rich and flavorful gravy made with onions, tomatoes, ginger, garlic, and a variety of aromatic spices. The dish is known for its bold and tangy flavors, and it is often served with steamed rice or roti. Katla Kalia is a must-try for fish lovers looking to explore the authentic flavors of Bengali cuisine.