Ruth Alexander explores the origins and evolution of the humble grab-and-go food the burrito, which started life in northern Mexico, before crossing over into the US and becoming a hit around the world.

Versions of the spicy wrap can be enjoyed in restaurants, street food shacks and supermarket home meal kits all over the world.

We explore the burrito’s contested origins, find out why some Mexican food purists dislike the popular menu item and ask what the future holds for it, and the cuisine more broadly.

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(Picture: a burrito in a restaurant in Juarez, Mexico. Credit: Vianey Alderete Contreras/BBC)

Presented by Ruth Alexander.