Amish Chicken Casserole (or Turkey?)

Looking at Holiday recipes and this caught my eye for Turkey leftovers. Why not use leftover turkey?
From http://www.mrfood.com/Casseroles/Amish-Chicken-Casserole-4044/ml/1/

This Amish Country recipe is sure to be a popular one at your house. We take the shortcut liberty of using cooked rotisserie chicken to get our Amish Chicken Casserole from the oven to the table quickly. You won't find another Amish casserole recipe like this one! Pair it with a side of veggies, and you're sure to have a fantastic dinner on the table.

What You'll Need:

8 ounces medium egg noodles, uncooked
1/2 cup butter
1/3 cup all-purpose flour
2 cups chicken broth
1 cup milk
2 teaspoons salt
1/2 teaspoon black pepper
2 cups chopped cooked rotisserie chicken
1 (4-ounce) can sliced mushrooms, drained
1/3 cup grated Parmesan cheese
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What To Do:

Cook noodles according to package directions; drain and set aside.

Preheat oven to 350 degrees F. Melt butter in medium saucepan over low heat; gradually add flour, stirring until smooth. Cook 1 minute, stirring constantly. Gradually add chicken broth and milk; cook over medium heat, stirring constantly, until mixture is slightly thickened and bubbly. Stir in salt and pepper; set aside.

Combine noodles, chicken, and mushrooms in large bowl; stir in sauce.  Spoon mixture into a lightly greased 9- x 13- inch baking dish; sprinkle with cheese.  Bake uncovered, 20 minutes or until thoroughly heated.