I enjoyed a delicious lunch at “Sal8 Ristorante”, located on the same street as the b&b where I stayed (near the train station)
Here’s that part of my trip report if you’re interested: Bus to agrigento...
Have a wonderful trip!
Edited to add...
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Another vote for "Sal8 Ristorante" which I enjoyed at Priscilla's recommendation, this past April. Truly delicious! Reservations recommended. Here's the contact info: Via Cesare Battisti, 8, 92100 Agrigento AG, Italy tel: +39 0922 661990
We had lunch at Gusto Sí, a little off of the Main Street. The food was delicious, fresh and creative, sandwiches and wraps among the choices. We had just about given up on finding a place to eat a lunch, not a full meal, when we spotted this place.
We were glad that we were staying near the Temples, down the hill from the city proper though.