In a small bowl, whisk together balsamic vinaigrette, mayonnaise and sugar

Bring a large pot of salted water to boil, add pasta bring to medium heat and cook according to package.

When pasta is finished cooking, transfer to a large bowl and let cool

Once pasta is cool, add the tomatoes, mushroom, black olives, green pepper, pementos, salt and pepper to taste

Add the dressing, toss to combine.

Refrigerate for at least one hour allowing the flavors marry.

Sprinkle with cheese, toss lightly and serve.