Agrigento is a small town, but the restaurants along and off Via Atenea serve honest Sicilian food at reasonable prices. The local cuisine leans heavily on seafood, couscous (a legacy of Arab influence), and seasonal vegetables.
La Corte degli Sfizi on Cortile Contarino, just off Via Atenea, is a good bet. Start with the mixed antipasti from the self-service buffet. Tel: 0922 20052.