Press crescent roll dough into a 13- x 9-inch baking pan; press perforations to seal.
Bake at 350° for 12 minutes or until golden; cool.
Stir together cream cheese, mayonnaise, and dressing mix; spread over crust. Sprinkle with broccoli slaw, and top with cheese; gently press into cream cheese mixture. Cover and chill at least 2 hours. Cut into squares before serving.
*1/3 cup each of finely chopped broccoli, cauliflower, and celery may be substituted for broccoli slaw mix.