The sweet-spicy pairing coats grilled chicken using the coming season's stone fruit, brown sugar, and peppers. We like the tart-sweet flavors of yellow nectarines over white nectarines in this recipe. But yellow peaches can be substituted for the nectarines. The chipotles in adobo sauce provide the smoky heat. It's a new way to grill your chicken with ingredients that aren't hard to locate and use. You can use all the parts of the chicken, keep the skin on, or go with skinless, boneless chicken breasts if you want. With this glaze, any moisture lost should be regained. So whip out that grill and get going.