Prepare the Marinade:
In a large bowl, combine the Greek yogurt, olive oil, lemon juice, minced garlic, ground cumin, paprika, salt, and black pepper. Mix well to create the marinade.
Marinate the Chicken:
Add the chicken pieces to the marinade, ensuring they are well-coated. Cover the bowl and refrigerate for at least 2 hours, or overnight for the best flavor.
Preheat the Oven:
Preheat your oven to 450°F (230°C).
Assemble the Skewers:
Thread the marinated chicken pieces onto the skewers, alternating with chunks of red, green, and yellow bell peppers, and onion chunks.
Bake the Kebabs:
Place the skewers on a baking sheet lined with aluminum foil or parchment paper. Bake in the preheated oven for 20-25 minutes, turning the skewers halfway through, until the chicken is fully cooked and slightly charred on the edges.
Serve:
Remove the skewers from the oven and let them rest for a few minutes. Serve the chicken kebabs hot with your favorite side dishes or dips.