Place the fish in a large bowl with the parsley, chilli, ginger, garlic, beaten egg, mayonnaise, fish sauce, lime zest and juice and the breadcrumbs and mix together.Shape the mixture into 6 x 8cm burgers, put them on a plate, cover with cling-film and chill for an hour if you have time. This will help them to hold their shape when you are cooking them.Heat the oil in a large frying pan. Add the fish burgers and cook over a medium heat for 4minutes on each side, until crisp and golden.To make the Salsa: Mix all the ingredients well together, taste and season with a little salt and black pepper. Set aside until ready to serve. To make the Chunky Guacamole: In another bowl mix the avocados, lime juice, scallions and chilli. Using a fork roughly mash everything together, taste and season.
Spread a little mayonnaise over each bap then layer with lettuce leaves, some slices of tomato and then the burger. Spoon a little mayonnaise on top of each burger and sprinkle on a little black pepper. Serve the tomato salsa and chunky guacamole on the side.