Middle Eastern-Style Grilled Chicken Kabobs - Once Upon a Chef

Ingredients

• 1 cup plain whole milk Greek yogurt
• 2 tablespoons extra-virgin olive oil
• 2 teaspoons paprika
• ½ teaspoon cumin
• ⅛ teaspoon cinnamon
• 1 teaspoon crushed red pepper flakes (reduce to ½ teaspoon for less heat)
• Zest from one lemon
• 2 tablespoons freshly squeezed lemon juice, from one lemon
• 1¾ teaspoons salt
• ½ teaspoon freshly ground black pepper
• 5 garlic cloves, minced
• 2½ to 3 pounds boneless skinless chicken thighs, trimmed of excess fat and cut into 1½-inch pieces (see note)
• 1 large red onion, cut into 1-inch chunks
• Vegetable oil, for greasing the grill