In medium bowl, gently mix all ingredients except 1/2 cup of the dressing, the rolls and romaine. Season with salt and pepper to taste.
Cut slit in top of each roll, being careful not to cut all the way through. If necessary, remove excess bread from interior of each to allow room for filling.
Stuff each roll with 1/4 cup lettuce and rounded 1/2 cup chicken mixture. Drizzle each sandwich with 1 tablespoon dressing.