Preheat oven to 375 degrees. Spray 9” Round Baking Pan with baking spray.
Unroll crescent roll triangles and arrange into rectangles to form a crust, pressing the seams together.
Bake the crust according to the package instructions, about 8 minutes or until golden brown. Remove from oven and cool completely, at least 30 minutes.
Meanwhile, in a medium bowl, combine cream cheese, mayonnaise, and ranch dressing mix. Chill in refrigerator to blend flavors while crust cools.
Spread the cream cheese mixture over the cooled crust. Top with broccoli, cucumber, carrots, and scallions. Sprinkle with cheese and any additional vegetables you desire. Chill before cutting.