Chinese fermented black beans (known in Cantonese as dou si ... plain (usually sold in small bags), in jars (usually labelled "black bean sauce") or flavoured with garlic and chillies (not ...

It seems an unlikely condiment to come across in one of celebrity chef Björn Frantzén’s outposts, but as it turns out, XO sauce – a Cantonese pantry essential – first popped up at the ...