These:
.... with butter on them.
They're actually rather sweet, as biscuits go, and are usually eaten as a snack/dessert - but I'm telling you, a bit of salty butter on those, and they're delicious.
... Yes, I realise my weird food is kind of tame.
I also have a friend who swears by nachos with chocolate sauce and onions, but I personally can't see that working.