How to cook the world's oldest curry
22 June 2016 Last updated at 00:45 BST
In 2010, two archaeologists from Washington State University in the US used starch analysis to trace the world's first-known or "oldest" proto-curry of aubergine, ginger and turmeric from a shard of pottery found in the ancient Harappan civilisation near modern-day Delhi.
Food writer Soity Banerjee demonstrates how to cook it.
Filmed and edited by Prem Boominathan, produced by Vikas Pandey