In a bowl, combine the sliced chicken, olive oil, chili powder, cumin, paprika, garlic powder, onion powder, salt, and black pepper. Toss them together until the chicken is beautifully coated.
Let the chicken marinate for at least 15 minutes, or up to 1 hour in the refrigerator.
Preheat a large skillet over medium-high heat.
Add the marinated chicken to the skillet and sauté for about 5–7 minutes until cooked through.
Toss in the sliced bell pepper and onion, cooking for an additional 3–4 minutes.
Squeeze the juice of 1 lime over the chicken and vegetables, stirring to combine.
Warm the tortillas in a separate skillet or microwave.
Pile the chicken and vegetable mixture onto the warm tortillas, then add your favorite toppings.
Enjoy your delicious Chicken Fajitas with friends and family.