Cut the chicken breasts into 1-inch cubes.
Chop the bell peppers and onion into similar-sized pieces.
In a bowl, combine olive oil, soy sauce, garlic, paprika, oregano, salt, and pepper.
Add chicken cubes to the marinade and mix well. Let it marinate for at least 30 minutes.
Preheat the grill to medium-high heat.
Thread the marinated chicken and vegetables onto skewers, alternating between them.
Place the skewers on the grill and cook for 10-15 minutes, turning occasionally.
Ensure chicken reaches an internal temperature of 165°F (75°C).
Remove from grill and let rest for a few minutes.
Serve warm with your favorite dipping sauce.