Choose your fish judiciously and have it minced. You don’t want anything too classy or endangered like cod or haddock. But try to include some salmon as much for colour as flavour. In Sweden they are very happy to mince your chosen fish in front of you in the fishmongers and very often have it pre-minced in pre-weighed bags. But in the UK you may want to finely mince the fish with a sharp knife or give it a very brief pulse in a food processor.
Add a generous pinch of salt and a grind of pepper. Then add the egg whites, Quaker Oats and grated vegetables and mix thoroughly. The mixture should stick together and not fall apart. If it’s too dry add egg white. If it’s too wet add more Quaker Oats. Leave the mixture to chill in the fridge for an hour or so.
When you are ready for dinner remove the mixture from the fridge and form into patties. If you are feeling indulgent pour breadcrumbs on a chopping board and press the patties into them so that they stick. Then fry until golden. Alternatively you can bake in the oven for about 20 minutes at 180c 160c(fan).