The panino con Fiore Sardo is a single Sardinian cheese given a bread, and what defines it is the smoke. Fiore Sardo DOP is a hard sheep's-milk cheese from the island's interior, made from raw milk and traditionally cold-smoked over slow fires of Mediterranean wood, then aged until it is dry, firm, and sharply savoury. The smoke is not a finishing note but part of the cheese's identity, running right through it, set against a deep, slightly piquant sheep's-milk tang. The sandwich exists to carry one strong cheese at its right age, and the whole decision is letting that intensity stand without burying it.
The craft is matching an assertive cheese to a bread that can hold its own. Fiore Sardo is dry and granular when well aged, so it is cut into thin slices or shaved rather than laid in thick slabs, which would read as one heavy, salty mass. It wants a bread with structure, often a Sardinian loaf or a sturdy crusted roll, because a soft white bread would collapse under the cheese's force and add nothing back. A counter is sometimes built in: a smear of miele amaro, the island's bitter honey, or a few slices of pear, since a touch of sweetness answers the salt and smoke without diluting them. No moist additions, because the point is the cheese and the bread, and water would mute the very smoke that makes it itself.
The variations stay in the cheese and its accompaniments: the bare bread-and-Fiore Sardo, the version with bitter honey, the one set against a cured Sardinian salume from the same interior. Each is one expression of a smoked sheep's-milk wheel given a bread, and each deserves its own article rather than being crowded in here.