Leverlåda(Swe)/Maksalaatikko(Finn). It's considered normal here, but I bet it still is the weirdest thing I've eaten.

It's basically mainly rice, liver and raisins mixed into a kind of mass. You usually serve it with either "liquid butter" or lingonberry jam. It's the second-worst food we use in Finland to scare foreigners with (very few can handle it, ideally you should have eaten it for as long as you can remember).