Creating the Turkish Chicken Kebab is easy if you follow these simple steps:

1. Prepare the Chicken: Cut the boneless, skinless chicken thighs into bite-sized pieces and set aside.
2. Make the Marinade: In a large bowl, combine yogurt, olive oil, lemon juice, minced garlic, paprika, cumin, coriander, salt, pepper, and red pepper flakes. Mix well.
3. Marinate the Chicken: Add the chicken pieces to the marinade, ensuring they are well coated. Cover the bowl with plastic wrap and refrigerate for at least 1 hour, or overnight for deeper flavor.
4. Soak Skewers: If using wooden skewers, soak them in water for about 30 minutes to prevent burning on the grill.
5. Preheat the Grill: Preheat your grill to medium-high heat (about 400°F/200°C).
6. Assemble the Kebabs: Thread the marinated chicken pieces onto the skewers, leaving a little space between each piece for even cooking.
7. Grill the Kebabs: Place the skewers on the grill and cook for 10-15 minutes, turning occasionally until the chicken is cooked through and has nice grill marks.