For the crab
Cook live crabs in boiling salted water for 8 minutes per kg, remove from water and allow to cool on a tray. I prefer not to ice them but it’s important to refrigerate once cooled down, ideally within 30 minutes.
Crack the crabs and remove all white meat from claws, legs, and head (retain crab heads if you want for serving); pick 3 times to ensure no shell or cartilage is remaining.
Use within a couple of days. If you prefer, you can use pre-picked crab meat, but preferably it should be unpasteurised.
To clean the crab heads, remove all internal parts and scrub clean then boil in vinegar water before rinsing and using sharp scissors to trim the outer edges of the shells.