1 tablespoon canola oil
1/2 pound sliced fresh mushrooms
1 large onion, chopped
2 tablespoons all-purpose flour
3 cups reduced-sodium chicken broth
1/3 cup white wine or additional chicken broth
1 tablespoon Dijon mustard
4 cups uncooked whole wheat egg noodles
2 cups cubed cooked chicken breast
3/4 cup cubed fully cooked ham
1/2 cup shredded Swiss cheese, divided
1/2 cup reduced-fat sour cream
1/4 teaspoon salt
1/4 teaspoon pepper
1 green onion, thinly sliced