I think King of Siberia translates to Korol Sibiri, which I did grow a couple years ago. I believe it was a yellow oxheart variety?
Anyway, what i remember is that the plant was kinda weepy looking, but quite productive. I don’t remember it having a dough like flavor though. To me it was OK, just a mild yellow variety, not real flavorful. But, I didn’t get to try too many of them as the plant got hit with disease and didn’t ripen enough of them.