Pan con lechón is a roast pork sandwich whose flavor is decided by an acid, not the meat. The pork is lechón asado, a shoulder slow-roasted after a long soak in mojo: sour orange, garlic, oregano, and cumin worked into the meat until the citrus has cut through the fat and carried the seasoning to the center. What goes into the bread is therefore not plain shredded pork but pork that already tastes of sour orange and garlic before anything is added to it. The mojo is the sandwich; the roasting is just how it gets there.
Cuban bread is the other half of the build, and it is doing structural work against a wet filling. The loaf has a thin, brittle crust and a soft, lard-enriched crumb, and it is split, loaded warm, and usually pressed or toasted so the crust crisps while the inside stays tender. The pork is piled in still juicy, raw onion is laid over it in thin rings, and a final spoon of fresh mojo goes on at assembly so the citrus reads bright rather than cooked. The raw onion is not a garnish. It is the sharp, crunchy counter that keeps a soft loaf and rich, fatty pork from collapsing into one note, and the second hit of mojo is what keeps the sandwich from tasting like a pile of roast meat. Built right it is juicy without being soaked, the bread holding a load that tastes of garlic and sour orange all the way through.
Pan con lechón sits in Miami's pressed Cuban and Florida Latin family, each a different build on the same loaf. The Cuban itself adds ham, Swiss, pickle, and mustard and goes under the plancha. Pan con bistec runs pounded steak and shoestring potatoes; the medianoche moves the Cuban fillings onto a sweeter egg roll; the Elena Ruz turns the form sweet with turkey and strawberry; the croqueta preparada folds croquettes in. Each is a codified build with its own logic and deserves its own article rather than being crowded in here.