What a serranito is
A serranito is a bocadillo built in layers: a grilled pork loin fillet, two or three slices of jamón serrano, a fried green pepper that's gone slightly charred at the edges, and a slice of fresh tomato, all packed into a warm crusty roll. The whole thing costs between €3 and €6 depending on where you eat it, and it takes about four minutes to put together.
It was invented in Seville in the 1970s — not in Córdoba — but it spread across Andalusia fast enough that every bar in the region makes one, and nobody thinks of it as a foreign import. In Córdoba, it sits alongside flamenquín and salmorejo as one of the default midday options. A working lunch, not a tourist lunch.