I've got some beautiful pickled herring --- meaty, generously sized fillets rolled around pickle pieces and secured with toothpicks, lots of onions etc. in the brine. I've just been snacking directly out of the container but want to serve it as part of a meal. The only accompaniment I can come up with, that sounds right, is sliced cucumber. What else is usually eaten with this stuff? Grainy German-style bread? And/or...?