Begin by preheating the oven to 375°F, positioning the rack in the center of the oven.
In a spacious bowl, combine the taco seasoning, lime juice, and olive oil. Add the chicken strips, bell peppers, and onion to the mixture, tossing them until evenly coated. Spread the mixture onto a rimmed sheet pan.
Roast the ingredients for 15 to 20 minutes, or until the chicken is fully cooked. For an additional layer of flavor and texture, you may opt to switch the oven to broil for the final 3 minutes, allowing the chicken to achieve a slightly charred finish.
Once cooked, transfer the chicken and vegetables to a serving dish. Serve with the tortillas, salsa, avocado, sour cream, cilantro, and lime wedges on the side for a complete meal.