Crusty bread stuffed with slices of herb-roasted whole pig is central Italy's ultimate sandwich. High protein and carnivore-approved, this mediterranean family classic needs nothing more.
Preheat your oven to 325°F. Prepare a roasting pan lined with foil; set aside.
Pat the pork shoulder or belly dry and rub all sides thoroughly with olive oil, salt, black pepper, and crushed fennel seeds to ensure even flavor.
Finely chop rosemary, thyme, and garlic, then combine and generously press the herb mixture all over the pork, making sure to work it into any crevices for balanced seasoning.
Roast the pork uncovered in the oven for about 2–2.5 hours, basting every 30 minutes with pan drippings, until a golden crust forms and the interior registers at least 160°F.
Allow the porchetta to rest for 20 minutes at room temperature. Slice thinly using a sharp knife to preserve juiciness.
Slice the crusty bread horizontally, pile with warm porchetta slices, and drizzle lightly with pan juices before closing and serving immediately.