Step 1

In medium bowl, mix chili powder, cumin, salt, garlic and lime juice. Add chicken, bell pepper and onion; stir to coat. Cover bowl; refrigerate at least 2 hours to marinate, turning once.

Step 2

Heat gas or charcoal grill. Cut 2 (18x12-inch) sheets of heavy-duty foil. Remove chicken and vegetables from marinade; discard marinade. Place half of chicken and vegetables on center of each sheet. Bring up 2 sides of foil so edges meet. Seal edges, making tight 1/2-inch fold; fold again, allowing space for heat circulation and expansion. Fold other sides to seal. Cut another sheet of foil; wrap tortillas securely in foil.

Step 3

Place packets on grill over medium heat. Cook chicken and vegetables 10 to 15 minutes or until chicken is no longer pink in center and vegetables are crisp-tender. Cook tortillas 2 to 3 minutes or until warm. Open foil carefully to allow hot steam to escape.

Step 4

Serve each chicken and vegetable packet with 2 tortillas. If desired, top tortillas with shredded lettuce, sour cream, guacamole, shredded cheese and salsa.