Wasabi is familiar as the pungent green paste served alongside sushi. Fresh wasabi can be hard to find outside Japan, but is available from specialist suppliers such as The Wasabi Company in the UK. You can grow it yourself too - they sell seedlings.
It's worth tracking down as it has a far superior flavour to the powdered variety, which often mainly consists of dyed horseradish, not true wasabi at all. Below are a few wasabi recipes to try - or search all ckbk recipes which use wasabi.