Preheat the oven to 375 degrees F (190 degrees C).

Arrange crescent roll triangles in the shape of a Christmas tree on a baking sheet. Pierce dough with a fork.

Bake in the preheated oven until golden brown, 10 to 12 minutes. Let cool while making the topping.

Mix cream cheese, sour cream, salad dressing, and dressing mix together. Spread mixture over the cooled crescent tree. Top with bell pepper, broccoli, and Cheddar cheese. Chill for at least 1 hour.