Speaking of things that are frequently confused between Russian and Ukrainian, I frequently see recipes for Ukrainian cabbage rolls (called “golubtsi” or “holubtsi”) categorized as Russian (such as in this buzzfeed article).
They are not. They are widely enjoyed in Russia, and have been for centuries, but they are a traditional Ukrainian dish. (Same goes for borsht.) My Ukrainian grandmother would be very insistent on this.
Here is a recipe for the classic meat-and-rice version.
And here is a vegetarian alternative.
Here are a whole bunch of variations, both with meat and without. (Since meat was often a luxury for the peasantry, meatless versions have been around pretty much as long as the meat-filled ones.)