This is Italian food before Tuscan rustic chic. The 'in carrozza' bit means 'in a carriage' and doesn't really explain what this golden-crusted fried mozzarella sandwich is about, just gives an indication that the milky cheese is somehow contained. What you should know if you've never tried it (apart from the fact that it is one of the easiest, most gratifying laptop dinners imaginable) is that it is somewhere between eggy bread, cheese on toast and fried slice. For children (and do bear this in mind for a quick, hot filler when they get back from school) it is desirably like pizza sandwich, and could be made more so with tomato sauce smeared within the bread's tender interior.
Recipe posted by Nigella