The Secret World of the Biryani

In India, food is almost a currency between cultures. It's a way of identifying which state you're from, what language you speak and also your religious practices. It's no different for people in Kolkata - they really love their food. In particular, they really love their Muslim food, as Vishala Sri-Pathma has been finding out. She spoke to Iftkar Essan of Calcutta Walks over a biryani.