In a large bowl, combine olive oil, onion, bell peppers, salsa, chili powder, garlic powder, cumin, smoked paprika, cumin, salt, and pepper. Mix until all ingredients are evenly incorporated.
Add chicken strips to the bowl and mix until all the chicken is well coated in the mixture.
Spread the chicken and vegetables on a baking sheet lined with parchment paper or aluminum foil.
Bake in preheated oven for 15-20 minutes or until chicken is cooked through.
Remove from oven and let cool for 5 minutes.
Serve chicken and vegetables in warm fajita-sized tortillas with a squeeze of lime juice, if desired.
Interesting Facts
Fajitas originated in Texas in the early 20th century.
Fajitas are traditionally served with warm tortillas, shredded cheese, pico de gallo, guacamole, and sour cream.
Fajitas are a type of Tex-Mex cuisine, which is a combination of Mexican and American elements.