Panzanella is a classic salad from Italian cuisine, especially in the central regions: Umbria, Tuscany... It's somewhat the emblem of "poor" cuisine; there isn't really a set recipe, just the ingredients you have on hand: stale bread, tomatoes, cucumbers, onions, basil... reinvented according to what's in your fridge!
Stale bread is usually softened by the salad juice. But I prefer to make croutons to keep a crunchy texture in the salad π