Chicken Noodle Bake

6 ounces thin egg noodles, cooked, drained
6 tablespoons butter
6 to 8 ounces sliced mushrooms
6 tablespoons flour
1 2/3 cups chicken broth
1 cup milk
1/4 cup pimiento, drained, chopped
1 1/2 teaspoons salt
1/2 teaspoon pepper
2 cups roasted deli chicken, diced
1 cup frozen peas, thawed under hot water
1/2 cup fresh grated Parmesan cheese, plus more for topping

Heat oven to 325 degrees F. Grease a 2 1/2- to 3-quart baking dish.

In large skillet or saucepan over low heat, melt butter; saut mushrooms until tender. Blend in flour, stirring until smooth and bubbly. Gradually add chicken broth, milk, pimiento, and salt and pepper; stir constantly until sauce is thickened. Stir in chicken, peas, and 1/2 cup of Parmesan cheese. Spoon the mixture into the prepared baking dish. Sprinkle some Parmesan cheese over top.

Bake chicken noodle casserole for 20 to 25 minutes, until hot and bubbly.