Which item is considered a classic Cuban sandwich offered at Porto's?

The Media Noche sandwich is recognized as a classic Cuban sandwich, particularly known for its sweet bread, which distinguishes it from traditional Cuban sandwiches. This sandwich typically features a combination of roasted pork, ham, Swiss cheese, pickles, and mustard, all layered between slices of soft, slightly sweet bread. The Media Noche, which translates to "midnight" in Spanish, is often enjoyed during late-night meals and has become emblematic of Cuban cuisine, especially in areas with a strong Cuban cultural influence.

The other options listed do not represent traditional Cuban sandwiches. The Cuban Reuben sandwich merges elements of a Reuben with Cuban flavors, while the Veggie sandwich and Turkey club sandwich cater to different dietary preferences and are not tied to the traditional Cuban culinary scene. Thus, the Media Noche stands out as the quintessential choice among the given options.