1Heat oven to 350°F. Spray 2 (11x7-inch) glass baking dishes with cooking spray.
2Cook and drain vermicelli as directed on package, using minimum cook time. Return to saucepan; add broth and toss to coat.
3In large bowl, mix chicken, soups, sour cream, mushrooms, Parmesan cheese, pepper and salt. Add vermicelli; toss well. Divide mixture between baking dishes. Sprinkle with Cheddar cheese.
4Cover; bake 30 minutes. Uncover; bake 5 minutes longer or until cheese is bubbly.