[RegulatorCountry]

So a sandwich seems to be just any kind of food that could be eaten on its own, but happens to be using bread for a handy container.

So is Stromboli a sandwich, then?

[Beagle8U]

Pretty sure a Stromboli is a musical instrument.

[Boogieman]

No, a stromboli would be a pastry, because the food is baked into the bread in that case. I guess we would have to qualify that in a sandwich, the bread is an post hoc container for the filling, not something that the filling is added to before the bread is baked.