Wash and peel the potatoes.Cut the potatoes into slices so they cook faster.
Steam the chopped potatoes.
Take out the steamed potatoes and let them cool to evaporate excess water.
Mash the potato slices.
Add milk powder and a small amount of sugar to the mashed potatoes. Because egg yolks are salty, the mashed potatoes should not be too sweet, just enough to have a sweet taste.
Take out the salted egg yolk.
Crush the egg yolks with the back of a spoon.
Apply a little oil on your hands, take an appropriate amount of mashed potatoes and roll them into small balls, then roll them in a layer of corn starch. The purpose of coating with corn starch is to prevent the mashed potatoes from falling apart during frying, so you don't need to coat them too thickly.
Put the mashed potatoes coated with starch into the pan and fry them. The oil temperature for frying the mashed potatoes can be slightly higher because the mashed potatoes are cooked. Just put them in the pan and fry them until they are shaped. Don't fry them for too long.
Put oil in the pan, add egg yolks, stir-fry until foam appears, then add appropriate amount of salt.
Add mashed potatoes and stir-fry evenly.