Preheat oven to 375 F.
Toss bread with olive oil, garlic, salt and rosemary. Bake for 20 minutes, until well toasted.
In a large bowl, combine capers, bell pepper, tomatoes, basil and toasted bread. Toss to combine.
In a small bowl, whisk together vinegar, salt and pepper for dressing. While constantly whisking, slowly drizzle in olive oil until well combined.
Pour half of dressing over salad and mix well. Add more dressing if necessary. Serve.
Garnish with cheese if desired.