Steam broccoli and cauliflower florets until tender.
Place broccoli and cauliflower in a large bowl, toss with butter and salt.
Bring a large pot of salted water to a boil. Stir in the macaroni and return the water to a boil.
Let cook until the noodles are al dente, drain well.
In a large mixing bowl, mix the Italian dressing with the hot macaroni. Next, mix in the carrots, cucumbers, tomatoes, broccoli, and cauliflower. Cover the bowl and refrigerate for 30 minutes.
After the pasta and vegetables have been chilling for 30 minutes, stir in the cheese. Return the bowl to the refrigerator for another 30 to 45 minutes before serving.
