VEGETABLE PANZANELLA WITH TUNA

Make sure your bread is dry so the croutons won't get soggy when tossed with the dressing. If you're using fresh bread, bake the bread crumbs at 350°F for 5 minutes. Serve this salad immediately, while the bread is still crunchy.

VINAIGRETTE:
2 tablespoons chopped fresh parsley
2 tablespoons chopped fresh basil
2 tablespoons olive oil
2 tablespoons red wine vinegar
1/4 teaspoon freshly ground black pepper
1 garlic clove, minced

SALAD:
2 1/2 pounds cucumber, peeled, halved lengthwise, seeded and sliced (about 4 cups)
1 1/4 cups diced zucchini
1 cup diced red bell pepper
3/4 cup halved pitted kalamata olives
1/2 cup thinly sliced red onion
1/4 teaspoon salt
3 tomatoes, each cut into 8 wedged (about 1 1/2 pounds)
1 (6-ounce) can albacore tuna in water, drained and flaked
4 cups (1/2-inch) cubed day-old whole-wheat bread (about 13 [1-ounce] slices)