When ready to serve, kill the marrons by swiftly cutting through the centre line of the head and thorax with a sharp chef’s knife. This is the most humane way to kill a crustacean that I know of. Twist the tails from the heads and blanch the tails in a saucepan of boiling water for 30 seconds — this will allow you to remove the tail meat from the shell cleanly. Using a heavy pair of kitchen scissors, carefully snip along both sides of the tail to remove the meat from the shell.
Place the tail meat in a vacuum pouch with the oil and vacuum-pack on 100 per cent for 30 seconds in a chamber vacuum sealer*. Place the bag in a circulating water bath (or saucepan filled with water) heated to 60°C (140°F) and leave for 6 minutes.
Remove the tail meat from the bag, cut in half, place in a bowl and season with the salt and lemon.
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