Place the diced cooked chicken into a large mixing bowl.
Add finely chopped celery, minced sun-dried tomatoes, and thinly sliced spring onions to the bowl.
Incorporate the grated carrot, lemon zest, and chopped spinach.
Spoon in the yogurt, mayonnaise, and Dijon mustard, followed by the lemon juice and Parmesan.
Stir the mixture thoroughly until it reaches a uniform, creamy consistency.
Portion 1 to 1½ cups of the chicken salad onto each tortilla and wrap tightly.
Serve immediately, or for added texture, toast the wraps in a dry skillet until golden and crisp.