Porchetta toscana is the Tuscan sandwich made from the local reading of the roast, and what sets it apart from the Lazio and Umbrian versions is the herb balance: rosemary and garlic lead, with wild fennel pulled back to a supporting note rather than the dominant one. This is a boned pig rolled with its own fat and packed through with a great deal of rosemary, generous garlic, black pepper, and salt, the finocchietto present but quiet. The result is woodier and more resinous than the fennel-forward styles, the meat moist, the skin a hard crackling. It is carved onto unsalted Tuscan pane sciocco with nothing added, and the choice of that saltless loaf is the whole point: the bread is a deliberate counterweight to a heavily salted, rosemary-loaded pork, not a flavour in its own right.
The craft happened at the spit, hours before any sandwich was built. The roll is seasoned to its centre so the rosemary and garlic reach the middle and every slice tastes finished rather than only the rim, and it is roasted slowly until the fat renders soft while the skin sets into the shattering cotenna. For the panino the meat is cut with a strip of that crackling worked back in, because the brittle counter to the soft pig is the texture the build is for. The bread is the quiet partner by design: pane sciocco is chosen precisely because it carries no salt of its own and so cannot fight a pork this seasoned, and it is sturdy enough to take the rendered fat without turning greasy. No sauce goes on, since a rosemary-and-garlic roast is already complete, and it is eaten warm or at room temperature so the fat stays soft and the rosemary stays forward.
Tuscany carries this one roast in several registers, and each is its own subject rather than a version of this one. There is the sagra van porchetta carved at the fair, the norcineria-style counter slicing to order, the leaner loin-only cut, and the rare build that pushes the wild fennel back up toward the central Italian profile. Each is the same rosemary-led Tuscan roast met by a different bread or hand, and each deserves its own article rather than being crowded in here.