Peperoncino refers to the red chili pepper that is also known to the people of Abruzzo as diavolino, or little devil. It is a key ingredient in the local cuisine. It spices up everything from brodetto alla pescarese, a fish soup made in the fishing port city of Pescara, to the time-honored spaghetti aglio, olio, e peperoncino - spaghetti with olive oil, garlic and chili

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Other definition:
Peperoncino is an Italian word for hot pepper flakes which is sometimes used as an ingredient for making sauces or dressings