Steps
1. In a bowl, combine the shredded chicken, mayonnaise, Dijon mustard, celery, grapes, and parsley.
2. Mix well until all ingredients are evenly coated.
3. Season with salt and pepper to taste.
4. Lay the tortilla flat and place lettuce leaves in the center.
5. Spoon the chicken salad mixture onto the lettuce.
6. Fold the sides of the tortilla and roll tightly to form a wrap.
7. Slice in half if desired and serve immediately.