Unroll crescent roll dough into one long rectangle. Press onto the bottom of a 13-in. x 9-in. baking pan coated with cooking spray; seal seams and perforations.
Bake at 375° for 11-13 minutes or until golden brown. Cool completely.
In a large bowl, beat the cream cheese, salad dressing mix and milk until smooth. Spread over crust. Sprinkle with vegetables. Cover and refrigerate for at least 1 hour before serving. Cut into 16 pieces. Yield: 8 servings.