I have tried a slightly different version of that, w/ the herring.. The theme was Norwegian, via Minnesota..
I had several dishes I had never tried & honestly thought would be disgusting but which were quite good & I encouraged my picky daughters/family to try them..
Pickled herring was prob the most surprising as it had cream or sour cream of some type & was not fishy & the flavors well balanced..
Another surprise was Pheasant (leg quarters) & Elk sausages cooked in sauerkraut..
The flavors coalesce very nicely, not sour & tended to lighten up a bit the heavier flavors of the meats.... YUM!!!!!
I really like sauerkraut, and that sounds really good!
One thing I appreciate about the Baltic countries: smoked, salted, and pickled fish!