1. Preheat grill to medium-high heat (350° to 400°).
2. Whisk together first 5 ingredients in a small bowl.
3. Toss shrimp with 2 tablespoons of the vinaigrette. Grill shrimp, covered with grill lid, 2 minutes on each side or until pink. Grill bread slices 1 minute on each side or until toasted.
4. Cut bread into 1-inch cubes. Combine bread, shrimp, tomatoes, olives, and basil in a large bowl; add remaining vinaigrette, and toss well. Season with salt and pepper. Can be refrigerated up to 2 hours before serving.