Cook pasta in large saucepan as directed on package, adding vegetables during the last 3 to 4 minutes of cooking. Drain well.
Place cream, cheese, broth, wine, butter, dill weed, garlic salt and thyme in same saucepan. Bring to boil, stirring constantly with wire whisk. Reduce heat to low; simmer 5 minutes. Add pasta and vegetables; toss gently to coat well. Serve with additional Parmesan cheese, if desired.