COOK pasta as directed on package, adding broccoli to the boiling water for the last 3 min. of the pasta cooking time. Drain, rinse under cold running water. Drain well; place in large bowl.
ADD onions, peppers and tomatoes; mix lightly. Add dressing; toss to coat. Cover.
REFRIGERATE at least 1 hour. Stir gently just before serving; sprinkle with the cheese.