Kosha Mangsho is a traditional Bengali mutton curry that is popular in Kolkata. It is made with tender pieces of mutton cooked in a rich and spicy gravy made with onions, tomatoes, ginger, garlic, and a blend of aromatic spices. The dish is slow-cooked to enhance the flavors and is often served with steamed rice or paratha. Kosha Mangsho is known for its bold flavors and is a favorite among meat lovers in Kolkata.