Put potato dumplings into boiling water, when water boils once again, carefully lift them from the bottom of a pot using a strainer or fish-slice. When potato dumplings rise to surface, boil them for another 10-15 minutes.
Put potato balls into boiling water. When they rise to surface, boil them for another 6-8 minutes. Potato balls may also be fried in oil at 160°C-180°C until they turn yellowish.