We had this all over Sicily and then in Rome. The photo here was taken in Siracusa, southeast Sicily.
It's a classic Sicilian dish of simple ingredients that must be fresh and well-prepared. Make this in summertime when the eggplant is fresh and flavorful. The tomatoes can be fresh in season or canned, but canned tomatoes without preservatives are better than "fresh" tomatoes out of season (the tomatoes were fresh when they went into the can). I like Cento brand canned tomatoes.