Lay out each tortilla and spread with mayo and/or Dijon mustard, leaving a ¼ inch edge around the tortilla dry. In the middle length of each tortilla, arrange turkey, cheese, apple slices, optional thinly sliced red onion, and greens. Season with salt and pepper to taste, wrap the filling starting at one end, and slice into 6-8 wheels, using toothpicks if needed to hold the ends together.