Stromboli can be a somewhat contentious term, and depending on who you ask, definitions vary somewhat drastically. We know what it's not—but while stromboli is neither calzone nor submarine sandwich, it's also not terribly distinct. So, what is it? Making stromboli begins with a dough—sometimes pizza, sometimes bread—that's stuffed with various cheeses and Italian cured meats. The fillings are encased in the dough—sometimes braided, sometimes rolled—then baked, and finally sliced to serve.