Chop the raw fish finely and then add it to a large mixing bowl together with the finely sliced spring onion, the grated ginger and the chopped chili. Season with the lime juice and a tiny pinch of sugar.

Mash the fish up with a fork until it's mushy. Then add the fish sauce, cornflour, red curry paste and beaten egg yolk.

Mash the fish again. Taste it and add extra fish sauce, sugar or lime juice to taste. Then let the fish paste rest in the fridge for 10 minutes. Pour a little frying oil in a large non-stick pan and place it over medium heat until hot. Then add little portions of the fish batter using a tablespoon (do this in batches if necessary). Flatten the top of the fish dollops nicely.

Cook the fish cakes for about a minute until they start to turn golden on one side. Carefully flip them  and then fry the cakes for another minute until nicely golden on both sides.

Let the fish cakes drain on kitchen paper, keep them warm under tinfoil while you fry the remaining cakes. Serve the fish cakes hot with cucumber dipping sauce.