Cilantro-and-Lime Marinated Chicken Fajita Kebabs

Ingredients

• packed coarsely chopped cilantro leaves and tender stems
• lime juice from about 6 limes
• extra-virgin olive oil
• medium cloves garlic, peeled
• tablespoon dark brown sugar
• teaspoons kosher salt
• teaspoons ground cumin
• teaspoon crushed red pepper flakes
• pounds skinless, boneless chicken thighs, cut into 1 1/2-inch cubes
• large red bell pepper, stemmed, seeded, and cut into 1 1/2-inch pieces
• large green bell pepper, stemmed, seeded, and cut into 1 1/2-inch pieces
• large white onion, cut into 1 1/2-inch cubes and separated into 3-layer segments
• Wooden skewers, soaked in water for at least 30 minutes prior to use