I thought that plum dumpling is an authentic Hungarian food, because it is a well-known fancied dish in Hungary and there is also a Hungarian folk tale about it, and finally but not last it played main role in one of the popular Hungarian musical and there is a song about it, which you can hear here. (Choose Szilvásgombóc).

But actually when I googled "plum dumpling" I found the Italian, and Croatian versions, too.

Well now I don't know exactly where is originated it, but I know that my children like it very much :)

Put 400 gr potatoes in their skins into a large pot of boiling water; boil for 25 to 30 minutes. Remove potatoes, and discard water. When cool enough to handle, peel potatoes, and place on a lightly floured surface. Mash potatoes.

Place mashed potatoes into a large bowl. Stir in (15-20 dkg) flour, (1) egg, salt (to taste), and (one tablespoon) oil. Knead well to form smooth dough. Then roll out the dough and cut square.

In a bowl mix cinnamon powder and icing sugar. Sprinkle the dough square with it, after place sliced plum in the middle of the square and create dumpling forms.

Cook a few noodles at a time in salted water for about 10 minutes. After cooking put them in toasted bread crumbs and finally sprinkle with icing sugar. The result will be yummy.

If you don't like plum use apricot or just cook sweet potato noodles.

Source: hungarystartshere.com