In a skillet on the stove saute mushrooms with 1 tablespoon butter for 2 minutes.
In a 4 quart pot cook egg noodles according to the package, but subtract 1 minute so the noodles are a little firmer so they don’t fall apart when baked.
Drain noodles in a colander.
Preheat oven to 375°
In the pot over medium-high heat, put 4 tablespoons butter and flour, cook for 1 minute, slowly add in chicken broth, heavy cream, and wine (I put these all in one measuring cup that is easy to pour from).
Add in cheeses and stir until cheese is melted and sauce is thickened.
Add in the mushroom mixture.
Add in the noodles and stir to combine.
Next stir in turkey (or chicken)
Stir in nutmeg, salt, pepper, and parsley.
Pour mixture into a 13x9 casserole pan.
Mix breadcrumbs with 1 tablespoon melted butter and stir to combine, put on top of the baking dish.
Bake for 30 minutes, or until the center of the casserole is heated thoroughly and breadcrumbs are toasted.