Preheat oven to 400°F. In a large bowl, toss bread, 1/3 cup olive oil, salt, pepper and garlic. Lay bread out on baking sheet and toast in oven for 15 to 20 minutes or until golden.
Remove bread from oven and cool slightly. Whisk together 1/4 cup olive oil and vinegar. In large bowl, stir together bread, tomatoes, basil, and mozzarella until the salad is combined. Stir in vinaigrette. Let salad sit for 20 minutes or so to allow bread to absorb dressing and for flavors to blend (depending on how crisp or soft you like your bread) and serve.