If you're interested--Swedish pickled herring:
How do the Swedes eat herring?
ABBA: “Darling, can’t you hear me? S.O.S!”
The following is excerpted from " Easy Swedish Pickled Herring- And its Long History"
(https://swedishspoon.com/pickled-herring/):
....Yes, that’s a line in the famous ABBA song, but in Sweden, it could also be a (somewhat rude) call to someone for a small meal.
The letters in S.O.S stand for smör, ost, and sill — butter, cheese, and herring. You eat this trio on hard bread and often rinse down with a shot of schnapps. You’ll often find this way of serving herring as a starter in traditional restaurants.
