I'm buying a few herring and mackerel tomorrow to make rollmops, soused herring and mackerel.
I've seen on another thread that some members would like to make rollmops, but couldn't find a recipe. There is info and recipes for fish curing, including rollmops on the links below.
http://seafood.ucdavis.edu/pubs/pickled.htm
And
http://web1.msue.msu.edu/msue/imp/mod01/01600592.html