In a 13-in. x 9-in. baking dish coated with cooking spray, combine the chicken, tomatoes, onion and peppers. Combine the oil, chili powder, cumin and salt. Drizzle over chicken mixture; toss to coat.

Bake, uncovered, at 400°F for 20-25 minutes or until chicken is no longer pink and the vegetables are tender. Spoon onto tortillas; fold in sides.