2chilies (birds eye deseeded and sliced for garnish to taste optional)
Freeze mud crab for 30 minutes and then blanch in boiling hot water and then submerge into ice water to refresh.
Clean and chop the crab in quarters, remove lungs and crack the claws by hitting them across the middle with a knife.
Add some off cuts of ginger and spring onion to the water in a pot on which you can sit a bamboo steamer, add the crabs to the steamer and steam for about 6 to 8 minutes or alternatively I would use my electric steamer or if you have a pot with holes in the base site that on a another pot with water.
Heat the peanut oil in the wok until smoking.
Add onion and cook till almost transluscent and then add garlic and cook for a few minutes.
Add the julienned ginger and chillies if using, 1 inch lengths of spring onion white part and the capsicum and sugar and fry a few minutes until fragrant.
Add crabs and toss, then add shoaxing wine, oyster sauce, sesame oil and stock and vinegar and cook for a few minutes (I just had this all mixed in a jug to pour in).
Sprinkle with sliced spring onion greens and coriander leaves on serving (as we don't care for coriander I omitted).