First, let's define our terms. What, exactly, is a sub? Does it resemble a hoagie, a hero, an Italian sandwich? And is the phrase meatball sub, for example, a contradiction in terms? The submarine sandwich has generated many a lively and plausible origin story in dozens of American cities, so choosing a "best sub" is a rather futile exercise, as the entity "sub" exists only as a continually transforming concept in the collective mind of America. However, it should be noted that the "Italian combo sandwich" — capicola, mortadella, Genoa salami, provolone, lettuce, tomato, and sliced red onion drizzled with oil and vinegar on a crusty Italian roll that's trucked up from Cusano Bakery in Miami — is prepared at the Porta Villa Italian Deli by the skillful hands of Warren and Janet Kart (who opened the place four years ago), and it does indeed resemble the sandwich we commonly call by that name. It's also delicious. And $7.