Add the milk to a pan and place the fish in and cook on medium heat for 5 minutes. Turn of the heat and allow the fish to cook further in the hot pan. Boil the potato with the skin until soft and set aside.
Drain the milk and flake the fish, using two forks. In a large bowl, grate the potato and add the fish.
Combine the chilli, coriander, mint, onion,breadcrumbs, ginger garlic paste, salt, pepper and egg yolk with the fish and potato. Season with the salt and mix well.
Divide the fish mixture into 12 to 14 portions, depending on how big you want the fishcakes, round balls. Flatten them in your palm.
Roll the fishcake into the flour and dust off the excess. Heat the oil in a pan and cook them until golden brown and crunchy. Drizzle some lemon juice over and serve.
Notes
You can add chilies according to your preference. I personally love a little extra chilli.
My mum also used bread soaked in milk in the recipe, instead of the potatoes. I would think about 2 slices of bread should be a good substitute. After it's soaked you will need to squeeze out any excess milk