If you discover right before popping dinner in the oven that you have no aluminum foil, and you happen to have made lasagna...
... you may find yourself thinking the top layer is like a cheese marshmallow that has been just a tiny bit overexposed to the fire! On the other hand, I did actually like the crispy crunch, even if it was a bit too much. Next time hopefully I'll have some foil on hand... but maybe take it off for longer at the end to get a little bit of this same effect.