In a large bowl, whisk together olive oil, lemon juice, minced garlic, paprika, cumin, salt, and black pepper. Cut the chicken breast into 1-inch cubes and add to the marinade. Mix well to ensure the chicken is coated. Cover and refrigerate for at least 1 hour, or overnight for maximum flavor.

Prepare the Skewers

If using wooden skewers, soak them in water for at least 30 minutes to prevent burning. After marinating, remove the chicken from the fridge and thread the chicken, bell peppers, and onion onto the skewers, alternating between the chicken and vegetables.

Grill the Skewers

Preheat the grill to medium-high heat. Place the skewers on the grill and cook for about 10-15 minutes, turning occasionally, until the chicken is cooked through and has nice grill marks.

Serve

Remove the skewers from the grill and let them rest for a few minutes before serving. Enjoy with your favorite dipping sauce or side dish!