Heat oven to 375. In medium bowl, mix all filling ingredients until well combined.
Unroll dough; separate into 4 rectangles. Place on ungreased cookie sheet; press each into 6x4 inch rectangle, firmly pressing perforations to seal. Spoon about 1/2 cup chicken mixture onto center of each dough rectangle. With knife, cut each corner of each rectangle from edge to within 1/2 inch of filling. Bring the points of each corner up and over filling. Firmly pinch to seal forming a square.
Bake at 375 for 16-21 minutes or until deep golden brown. Remove from cookie sheet. Garnish each with 1 Tablespoon Caesar dressing and 1/4 cup shredded lettuce.