Grilled Chicken and Peaches with Chipotle-Peach Dressing

Chicken breast halves with, boneless skin

Adobo sauce from canned chipotle chiles

Cilantro plus, fresh sprigs

Peaches, large

Peach preserves

Olive oil plus, extra-virgin

Red wine vinegar

Vegetable oil spray, Nonstick

Peach nectar