Step 1

In a medium bowl, combine chicken, grapes, celery, carrots, walnuts, mayonnaise, salt, and pepper; mix well.

Step 2

Lay tortillas on work surface. Place lettuce on each tortilla then spoon chicken mixture evenly onto center of lettuce. Fold bottom of each tortilla up over chicken mixture, then fold both sides over, envelope fashion. Fold top of each tortilla closed and turn seam side down. Serve immediately.