Finely chop the Japanese leeks, and grate the potatoes.
Add the ground pork to the ingredients from step 1 along with the ingredients marked with ★, and mix together with a spatula.
Make the patties as big as you like and fry in a heated pan. Use a non-stick pan so you don't need oil.
Flip over once they've browned on one side, cover with a lid, and continue cooking (at low to medium heat).
Add the ingredients marked with ※, and you are done once the patties have become evenly coated.