Pepperoncini, also known as Tuscan peppers, sweet Italian peppers, waxed peppers, and golden Greek peppers, are a variety of Capsicum annuum. While called "pepperoncini" in American English, in Italy these and other sweet varities of peppers are known as peperoni (singular peperone), while the term peperoncini (singular peperoncino) is used for hotter varieties of chili peppers.
Evidently I had never been exposed to this word beforehand, and thought it was a typo for "pepperoni" on the Port of Piraeus menu. The relevance here is that I have a hard time with anything spicy. I mean, I had heard of sweet peppers before, but not this. Am I alone here?