Shrink-wrapped "sour cabbage"?

Recently shopping at Harvest on W. Lawrence I passed this item in the produce section. It looks a bit dangerous--large, soft-ish, probably fermented. I was wondering if anyone is familiar with its cultural/geographic home and uses. Had never seen it before. Just curious.

in my house (or rather, my parents') it's used to make stuffed cabbage, or you can slice it thin, toss it with salt & pepper and a little oil & red wine vinegar, and you have yourself a salad. i'm croatian, and i think it's safe to say this product would be used pretty frequently in any Eastern European culture. hope that helps.

Prior thread on pickled cabbage here.

Used for stuffed cabbage by Hungarians, particularly around holiday time.

I am Croatian, too, and my gram uses it to make sarma - aka stuffed cabbage. All I can recall is it stinking to high heaven when she was preparing the dish. But the results were delish!!

Link to a recipe from the Croatian newspaper...

http://www.croatianmall.com/croatia/food/sarma.htm