The paninoteca is defined less by a fixed recipe than by a method: it is the panino built to order at a dedicated counter, where a wall of cured meats, cheeses, grilled vegetables, and spreads is assembled into one sandwich on request. What makes it itself is the pairing logic, not any single filling. A good paninoteca build is a deliberate match of one cured meat, one cheese, and one sharp or wet element that cuts them, chosen so they balance rather than merely pile up. The defining fact is the editing: a salame, a soft cheese to bind it, a grilled vegetable or a leaf with bite to lift the fat. The skill is in the restraint, not the abundance. A sandwich with everything on it is the failure mode the form is built to avoid.
The craft is the counter discipline. The bread is chosen to the filling rather than the other way round: a chewy ciabatta for an oily grilled build, a soft roll for a delicate ham, a sturdier loaf for a wet, acidic one. The meat is sliced to thickness on the spot, shaved for a sharp aged ham, cut thicker for a soft salame, so the cut suits the cure. The bind is intentional, a film of soft cheese or a thread of oil sealing the crumb so a juicy element does not go to paste. The wettest component is layered between drier ones, and the whole is often pressed warm so the cheese slackens into the meat. What separates a serious paninoteca from a sloppy one is that every element earns its place and the sandwich still holds in the hand.
The variations are really the named builds that come out of this method, and each deserves its own article rather than being crowded in here. There is the pressed warm panino with a melting cheese, the gourmet build that treats the form as a plated composition with a single luxury filling, the regional house panino assembled from one area's larder, and the vegetable-only build carried by oil rather than meat. Each is a distinct construction with its own balance to strike, and the paninoteca is the kitchen they come from rather than a recipe in itself.