The Swedish traditional dish 'sürstromming' comprises fermented Baltic herring - a freshly opened can is considered one of the most putrid smells in the world! Regularly eaten outside at 'fermented herring parties' it is often accompanied by sweetened flatbread and washed down with Schnapps. Any excuse for a party! Luckily, for those who cannot stand putrid smells there are plenty more fish in the sea...