The panino con ventricina is built around a salame that refuses to settle on one texture, and that variability is what defines it. Ventricina is the spiced pork salume of the Abruzzo and Molise hills, coarse pork worked with sweet and hot peppers, and depending on where it is made it arrives anywhere between a soft, almost spreadable paste and a firm, sliceable cured sausage. The pepper is the constant: a warm, sweet-then-hot heat that runs through the fat and gives the sandwich its signature. The form is the variable, and the bread is chosen to suit whichever form is in hand, which is the opening decision the sandwich makes rather than an afterthought.
The craft is matching the cut to the bread, because a paste and a slice ask for different carriers. A soft, spreadable ventricina is worked across the crumb so its heat and fat distribute evenly and no single bite turns into a pocket of chilli; a firmer, sliceable one is cut thick enough to keep its bite and laid in folds so the coarse grain and the visible flecks of pepper stay legible. Either way the bread needs structure, a crusted roll or a country loaf, since a fatty, assertive, pepper-driven meat would slump a soft white bread and wants something with spine to push against. Almost nothing else belongs: the salume is already seasoned through its depth, and adding a sauce or a cheese would only blur a flavour built to stand alone.
The variations are largely regional and turn on that question of texture and place. The soft, paste-like spreadable version from the Teramo side is the ventricina teramana; the firm, large-cut sliceable one from the coast around Vasto is the ventricina vastese. Each is the same pepper-spiced pork argued in a different town and a different texture, and each deserves its own article rather than being crowded in here.