Remove the skin from your fish filet, if necessary.
Dice the fish into ½ inch pieces.
Add all ingredients into a medium mixing bowl, and stir to combine.
With your hands, take a scoop of the mixture and form it into a patty.
Place fish cakes on a parchment paper lined baking sheet, and put them in the freezer while your oil preheats.
Place a large skillet on the stove over medium heat.
After the pan preheats for a few minutes, put enough oil in so that there is a ¼ inch coating all across the surface of the pan.
When the oil is hot, remove your fish cakes from the freezer, and place in the oil. There should be sizzling and bubbling.
Fry until crispy on the first side, about 3-4 minutes.
Flip the fish cakes, being careful not to splash yourself, and fry until crispy on the second side, another 3-4 minutes.
Drain on a plate lined with paper towels, sprinkling with salt immediately after they come out of the oil.
Serve on a toasted bun with lettuce, tartar sauce, and a squeeze of lemon.