Grilled Asparagus, Zucchini, and Bread Salad with Olive-Caper Dressing

lbs Asparagus

Lemon

Parsley, fresh leaves

Red onions, cut into 1/2-inch slices, medium

Zucchini

Black olives, pitted

Capers, dried, and chopped

Kosher salt and freshly ground black pepper

Olive oil, extra-virgin

Red wine vinegar

Loaf italian bread (about 12 ounces)