In a medium bowl, combine olive oil, soy sauce, garlic, cumin, paprika, chili powder, and black pepper. Whisk together until well combined.
Place chicken breasts in a large resealable bag and pour marinade over them. Seal the bag and let chicken marinate in the refrigerator for at least 30 minutes.
Preheat oven to 350 degrees F.
In a large baking dish, combine bell peppers, onion, and chicken. Pour remaining marinade over the top and mix until everything is well combined.
Bake in preheated oven for 30 minutes, or until chicken is cooked through.
Serve with your favorite sides.
Interesting Facts
This dish is a great way to use up leftover vegetables you may have in your refrigerator.
This dish can easily be made in the slow cooker. Just put all the ingredients in the slow cooker and cook on low for 6-8 hours.
This dish is a great meal-prep option. Make it ahead of time and store in the refrigerator for up to 4 days.