Cook noodles as directed on package.
Melt butter and cook mushrooms ina large skillet until lightly browned
.Stir in flour and blend in with a fork orslotted spoon
.Stir in milk and broth and seasonings; whisk sauce constantly until thickened
.Combine sauce, noodles and chicken.
Adjust seasonings to taste.
Placein a 2 quart casserole dish. Sprinkle top with Parmesan cheese and bakeat 350°F for 30 minutes.