Citrus-Cilantro Chicken Skewers

Cuban mojo inspired these tangy-sweet chicken skewers that are cooked under the broiler. A mixture of citrus zest and juice, cilantro, vinegar and garlic doubles as a quick marinade and sauce for serving on the side. Grapefruit or oranges work equally well here; when zesting the fruit make sure to remove only the colored peel, not the bitter white pith underneath. For easiest cleanup, line the baking sheet with foil before placing the skewers on top.