In a saucepan cook green beans, covered, in salted boiling water for approximately 5 minutes.
Add pasta.
Return to boiling and boil cook 5 minutes more or till vegetables and pasta are tender.
Drain.
Set aside.
Cook mushrooms, onion, basil, and oregano in hot butter till tender.
Stir in flour, salt, and pepper.
Add milk.
Cook and stir till bubbly
Stir in Swiss cheese, and mustard.
Cook for about 1 minute more.
Gently toss cheese sauce with pasta vegetable mixture.
Add tomatoes; toss gently.
Sprinkle with bread crumbs and Parmesan cheese
Bake in a 400°F oven 20-25 minutes or till hot