Wash and pear the potatoes. Chop in pieces. Place them in to a bowl, cover it with plastic wrap and heat in the microwave for 6 minutes (500w).
Mix starch with milk. Dissolve well until the starch perfectly melts.
Mash the potatoes very well. (You can also use strainer to make it a smooth paste)
Add the mixture of milk and starch little by little to the mashed potatoes.
Divide the mashed potato into five parts.
Put some cheese inside each mashed potato and make them balls.
Put the pan over middle heat and add butter. Cook potato balls until golden brown. (Get a lid on a pan so that the cheese inside would well melted)
Turn over the potato balls and add some soy sauce.
Decorate with chopped leeks and finished! Serve hot!!
