1. Cook pasta according to package directions, adding broccoli during the last 2 minutes of cooking time; drain. Rinse and cool. Toss with parsley.
2. Place half of pasta mixture in a 4-qt. glass bowl; top with half each of tomatoes, beef, and onions. Repeat layers once. Pour dressing evenly over salad. Cover and chill at least 2 hours or overnight. Top with cheese before serving.