How to Make It
Preheat the broiler. Toast the bread for about 1 minute, turning once, until golden. Let cool, then rub the toasts with the garlic. In a bowl, combine the water and vinegar; sprinkle on the bread and let stand for 1 minute, until moistened slightly.
Break the bread into chunks; transfer to a bowl. Add the tomatoes, cucumber, scallion, olives, basil, oregano, capers, anchovies, tuna and oil. Season with salt and pepper and toss. Serve with the Farinata.