ROTTEN FISH Yeah, delicious fermented herring is the food of north Sweden people. Here all about it, how to buy, open and eat it, what to drink and what to do afterwards. 1. When You buy it when the leaves fall off the trees, that is in the fall in late August or in September. You buy it in cans which you will find in the deep freezers in every ordinary food store. When you got home you store ...