Which type of sandwich at Porto's features roasted pork?

The focus on roasted pork in this particular sandwich is key to identifying it correctly. The Cuban or Cubano sandwich commonly includes layers of roasted pork along with other ingredients like ham, Swiss cheese, pickles, and mustard, all served on Cuban bread. The context here shows that the terms "Cuban" and "Cubano" can often refer to the same type of sandwich, particularly in varying regional contexts or in different culinary discussions. In many places, “Cubano” is the Spanish term for the Cuban sandwich, thus aligning it with the expectation for a sandwich featuring roasted pork.

In contrast, the other options do not highlight roasted pork as a primary ingredient. A steak sandwich typically features beef and does not include roasted pork, while a chicken sandwich focuses on chicken as its main protein, omitting any pork. Therefore, the emphasis on roast pork distinctly identifies the correct sandwich type in this question.