Wash and slice the vegetables, then set them aside. If your chicken is not already cooked, prepare it until golden and crisp, then let it rest briefly before assembling.
Warm the tortillas in a dry skillet for a few seconds on each side. This makes them softer and easier to fold without tearing.
Spread a thin layer of mayonnaise or yogurt over the center of each wrap. Keep the sauce in the middle so the wrap stays neat when packed.
Add lettuce, tomato, cucumber, cheese, and crispy chicken on top of the sauce. Season lightly with salt and pepper if needed.
Fold in the sides, then roll the wrap tightly from the bottom up. Slice it in half if you like, or wrap it snugly for lunch storage.