For this tomato bread salad, you should opt for bread that is firm enough to hold its form while tossed with the tomato dressing but not something that’s too stale to chew. The most popular choice is Tuscan bread, because the dense texture holds up well in panzanella and it isn’t salted so you won’t have an overwhelming salt flavour in the finished salad. If you can’t get Tuscan bread, choose anything you want so long as it’s not too crusty or too soft.