Empanada specialists, Chango work out of a base in South West London, to offer these savoury treats either at stalls on various markets currently, among others, St. James, Picadilly ( Mondays) Duke of York, Chelsea ( Saturdays), as wellas Brick Lane ( Sundays)- or as a catering service. If you're not familiar with empanadas, they are sort of a smaller, more highly seasoned South American version of a pasty, albeit in a greater range of authentic (savoury) flavours. About £3 each, as memory serves, from the market stalls, but significantly cheaper if ordered in advance ( by phone or on the website). Personally, I'd much rather have two or three of these for lunch than a soulless sandwich. Should you visit them when they're in Chelsea, avoid the risibly over-priced juice stall next door, read more