This is the recipe I found handwritten in my Polish grandmothers cookbook. I have since found ones almost identical in Polish cuisine cookbooks. I so looked forward as a child to the Sundays that the (Best Pie Egg Yolks)
Kopytka (literally & hooves& are a kind of potato dumpling. They are very similar to gnocchi although they are typically served baked with cheese, fried bacon or onion. The dish is a part of Belarusian, Lithuanian and Polish cuisines.