The Sardinian sausage in this panino is seasoned for a dry climate, and that is what sets it apart from a mainland sausage roll. Salsiccia sarda is coarse-ground pork worked with wild fennel seed and often myrtle, garlic, and a hard hit of pepper, then sometimes air-dried so it firms toward a soft salame rather than staying a fresh banger. The fennel is the signature: an aromatic, slightly aniseed lift that sits on top of the pork fat and keeps it from reading as one heavy note. The bread is there to carry that seasoning, not to compete with it, which is why the loaf is plain and the additions are almost none.
The craft depends on which state the sausage is in. Cooked fresh, it is grilled or pan-seared so the fat renders and the fennel comes forward in the heat, then split so the cut faces colour and lie flat in the bread. Cured and semi-dried, it is sliced thin on the bias and laid in cold, the myrtle and fennel more concentrated and the texture closer to a firm salame than to grilled meat. Either way the bread does the same job: a plain Sardinian loaf or a crusted roll, sometimes a sheet of pane carasau softened slightly, sturdy enough to take the rendered fat without going slack. No sauce is added because the fennel and myrtle are the entire point and a condiment would bury them. It is eaten warm if grilled, at room temperature if cured, never fridge-cold, when the aromatics read clearest.
The variations are mostly about that fresh-versus-cured split and the bread underneath. There is the grilled version on a soft roll, the dried slices on pane carasau, and the festival plate of grilled sausage eaten off the coals with bread on the side. The wider Sardinian shelf, the porceddu and the island's cheeses among it, follows its own logic and those deserve their own articles rather than being crowded in here.