Firstly you need to pop the potatoes into boiling water, then put your salmon in the smaller pan and cover with milk. Turn the heat onto full for the salmon and then once it's come to the boil, reduce the heat and simmer gently for 10 minutes. After 10 minutes, remove the fish from the milk and leave them to the side to cool slightly. By now the potatoes should be nice and soft also, so drain them and pop them back in the pan. If your potatoes need a few more minutes to soften, that's fine, just leave them boiling until they're ready to mash.
Turn the heat onto low for the potatoes and give them a good mash to get rid of any lumps. Empty the mash into your mixing bowl, then flake the salmon into the bowl, discarding the skin. Add the chilli, coriander and the juice of a lemon. Add a large pinch of salt and pepper, crack in the egg and then give everything a stir together.
Lightly flour your chopping board and then tip the contents of the bowl onto the flour. Now for your 2 spare plates. Put a good layer of flour on one (about 3 dessert spoons), and lightly dust the other. Before you start making the fish cakes, you need to go and put the pan to fry the fish cakes onto a high heat and add the oil. We want this to get nice and hot, but keep an eye on it, if it starts smoking, turn it down.
This is where you have to get your hands messy! You need to roughly divide the mix on your board into 4 (4 fish cakes). Lightly dust your hands with flour and then with the mix still on your board, shape one of the quarters into fish cake shapes! Do it nice and slowly, cup your hands round the outside then squash them as if you were making burgers. Using your fish slice, carefully pick the cake up and flip over onto the plate with the layer of flour.
Using your fingertips, sprinkle more flour over the cake until covered. You should be able to pick it up now, so gently remold them into whatever shape you want. Once you've shaped the cake, pop it on your other plate. Repeat this process with the other cakes until you have 4 nice looking fish cakes. Remember to keep an eye on the oil as I don't want you burning your kitchen down!
Once you're all done, go and give your hands a good wash then take the plate of fish cakes over to the hob. If you had to turn your pan off, turn it back onto a high heat. To test that the oil is hot enough, take a little corner of one of the cakes and drop it into the oil. Be careful not to splash yourself as the oil will be very hot! If the little cube rises to the surface and starts bubbling, then it's the perfect temperature. Very carefully using a slotted spoon, lower 2 fish cakes, one at a time into the oil for 1 minute on either side. All we need to do here is crisp the outside and heat them through, as everything is already cooked. Carefully turn the cakes and they should be getting nice and crispy.
Whilst they're finishing, get another plate and put some kitchen paper on the bottom, before taking the fish cakes out and onto the paper. Repeat the process with the other two fish cakes. Just watch the oil temperature, if it starts to smoke, turn it down. Once you've cooked the second pair, remove and add them to the plate with the others and your done!
To serve, overlap them on a plate, with a little of your favourite salad and a wedge of lemon.
I hope that you enjoy it.