Creating these delectable fish cakes is a straightforward process. Follow these simple steps to bring this dish to life:

1. Prepare the Fish Cake Mixture:
   • In a large bowl, combine the cooked fish, mashed potatoes, breadcrumbs, chopped parsley, egg, lemon juice, salt, and pepper.
   • Mix the ingredients thoroughly until well combined. The mixture should be moist but firm enough to hold its shape.
2. Form the Patties:
   • With your hands, shape the mixture into small patties, about the size of your palm. Ensure they are evenly sized for consistent cooking.
3. Fry the Fish Cakes:
   • Heat a generous amount of oil in a pan over medium heat.
   • Once the oil is hot, carefully place the fish cakes into the pan.
   • Fry the patties for about 3-4 minutes on each side, or until they are golden brown and crispy.
   • Remove the cooked fish cakes from the pan and place them on a paper towel to drain any excess oil.
4. Prepare the Tartar Sauce:
   • In a small bowl, combine the mayonnaise, pickle relish, lemon juice, and a pinch of salt.
   • Mix well until all the ingredients are fully incorporated. Adjust the seasoning to taste.
5. Serve:
   • Serve the crispy fish cakes warm, with the tartar sauce on the side for dipping.