Tuna panzanella salad

Ingredients

• 3 tbsp red-wine vinegar
• 2 tbsp olive oil
• 1 small garlic clove , minced
• 2 cups torn, day-old multi-grain artisanal bread
• 2 170-g cans tuna , in broth and oil, drained and broken into chunks
• 2 vine-ripe tomatoes , chopped (1 1/3 cups)
• 2 cups chopped English cucumber
• 1/2 cup thinly sliced red onion
• 1/2 cup mini pearls of bocconcini
• 2 tbsp sliced kalamata olives
• 1/2 cup torn basil leaves