Shlishkes is a dish of potato

Potato

The potato is a starchy, tuberous crop from the perennial Solanum tuberosum of the Solanaceae family . The word potato may refer to the plant itself as well as the edible tuber. In the region of the Andes, there are some other closely related cultivated potato species...

-based small dumplings (called krumplinudli or nokedli in Hungarian) popular in Hungarian cooking

Cuisine of Hungary

Hungarian or Magyar cuisine is the cuisine characteristic of the nation of Hungary and its primary ethnic group, the Magyars. Traditional Hungarian dishes are primarily based on meats, seasonal vegetables, fruits, fresh bread, cheeses and honey...

 and often found in the Jewish cooking of Jews in the Ashkenazi community.
It is formed from a soft dough of cooked mashed potatoes, egg, flour and water; the dumplings are boiled and rolled in sugar and hot buttered caramelized breadcrumbs (streusel

Streusel

In baking and pastry making, streusel is a crumb topping of butter, flour, and white sugar that is baked on top of muffins, breads, and cakes .Some modern recipes add various spices and occasionally chopped nutmeats...

).

When cooking Plum Dumplings called Gombotzen then the leftover batter is formed into small (finger-sized) breaded rolls, called krumplinudli.