Janssons frestelse

Etymology
Literally, ”Jansson's temptation.” Possibly from the opera singer Per Janzon (1844–1889), or from a film with the same name from 1928.

Noun

 * 1) a casserole of potatoes, onions, pickled sprats, bread crumbs, and cream

Usage notes
Often colloquially shortened to "Jansson(s)."