Grilled Shrimp Panzanella

Ingredients

• 2 lb. tomatoes , cut into 1-inch chunks
• 1/2 c. plus 2 tablespoons olive oil
• 1/4 c. red wine vinegar
• 3/4 c. pitted kalamata olives, thinly sliced
• 1 small red onion, thinly sliced
• 1/4 tsp. red pepper flakes
• 1 1-pound loaf crusty Italian bread, cut into 1-inch cubes
• 2 tbsp. drained capers, chopped
• 1/2 tsp. kosher salt, plus more taste
• 1 1/2 lb. large shrimp, peeled and deveined
• 3 garlic cloves, grated
• 1/2 c. fresh basil, chopped