Cook tortellini according to package directions. While tortellini cooks, cut broccoli into florets. Slice green onions and cut tomatoes in hlaf. Place in a large bowl. Add olives, Italian seasoning, salt and pepper.
Drain tortellini and rinse with cold water. Add to the bowl and pour salad dressing over all. Stir to combine and refrigerate until eating. For best flavor, refrigerate for at least 4 hours before eating.