The Italian hero is the specific cold build that the New York hero family is named around, and what defines it is the cured-meat trio doing the work that a single deli meat does in a plainer sub. Capicola, salami, and ham are shingled the length of the roll with provolone, and the three are not interchangeable: the capicola brings spiced heat and fat, the salami brings dry funk and chew, the ham brings a mild sweet base that keeps the other two from reading as one salty note. Provolone is the binder, sharp enough to register against the meats rather than disappear under them. The hero-sandwich logic of the long roll and the full-length layering is established elsewhere and is taken as given here; what makes this one its own sandwich is that the filling is a deliberately tuned stack of three cured meats rather than a quantity of one.
The craft is in the shingle and the dress. Each meat is sliced thin and overlapped so that every bite crosses all three plus the provolone, never a mouthful of straight salami followed by a mouthful of straight ham. Lettuce is shredded, not leafed, because shredded lettuce distributes and adds crunch in every bite where a whole leaf would shear out in one pull and leave the rest bare. Tomato is sliced and salted. The dress is oil and vinegar, applied as a system: the oil carries the oregano and coats the meats, the vinegar cuts the cured fat, and together they season and lubricate without soaking the crust into mush. The roll is Italian hero bread with a real crust, chosen because a long, heavy, oil-dressed cold load needs structure under it to stay liftable to the last bite. This is counter food a deli can build in a minute and a half and sell all day, which is half of why the build is fixed: the sequence is muscle memory, and the muscle memory is the recipe.
The Italian hero sits among its relatives by other names and other dress, the hoagie, the grinder, the wedge, and the hot parm and cutlet builds that turn the same roll into a vessel for sauce. Each is a codified build with its own rules and deserves its own article rather than being crowded in here.