Food / Pozdravy - What kind of food is this? [11]

I did buy some dumplings stuffed with sauerkraut and mushroom the other day. They were very nice, but reminded me very strongly of ravioli. The sauerkraut wasn't as strong as I'd expected.

I'd like to be able to make these at home, actually. I imagine the outside part of the dumpling is simply a sort of flour and water dough?