Scrape the crab meat into the pan with the drained, cooked potatoes. Add in the springs onions, chilli, coriander and fish/soy sauce and mash loosely with the back of a fork.
Combine everything well and then shape into patties.
Heat a real good glug of oil in a frying pan until shimmering. Very carefully slide a crab cake into the hot oil. Don't overcrowd the pan.
Cook for 2 minutes then swiftly turn the patty over to cook the other side. Do be careful as it is easy to get splashed with the hot oil.