Amritsar's stuffed flatbread has been baked the same way for roughly 200 years, evolving from Mughal-era naan into a dish so identified with the city that 'Amritsari' is now shorthand for it anywhere in India.
A leavened maida dough is stuffed with spiced mashed potato, then pressed onto the inner wall of a clay tandoor and baked until blistered and smoky. Vendors split it open, load it with butter, and hand it over with a bowl of spiced chickpeas, tamarind chutney, and pickled onion.