One of the must-haves in Borough Market - the famous Duck Confit Sandwich from Le Marché du Quartier. At £5, it's one of the cheaper market food options considering the usual price range for savoury market grub is now £6-7. Plus, the sandwich is pretty huge, making it a great value-for-money lunch option. The shop sign is not that obvious, so keep a lookout for colourful tubs of sangria at the store front, or just follow your nose.