• A type of broad leafed kelp, genus Laminaria, which is available as dried thick dark-green strips (30 cm long and folded) or in powdered form. Used to make stock, to make a tea or eaten as a vegetable after boiling for 30 minutes. On storage it develops a white surface covering which should be wiped off before use. It is soaked to soften and then scored with a knife to release the flavour and may be used twice or more before all the flavour is extracted.