Panin de porzina con senape e kren is a type of panini made with porzina, mustard, and grated horseradish, which are tucked inside a rosetta bread. It is a specialty of Trieste, a town in northeast Italy that is a medley of Latin, Slavic, and German influences.

The main ingredient porzina (or porcina) is a boiled pork collar (Italian coppa and spalla cuts) that is prepared by hours-long cooking in a mixture of water, pepper, bay leaves, and white wine.