Chicken Noodle Caserole

From: The Cutting Edge of Ordinary

1 package of egg noodles
6 tablespoons butter
½ small onion, chopped
1-10 oz package of mushrooms, sliced
¼ cup flour
2 garlic cloves, minced
3 cups low sodium chicken broth
1 - 16 ounce container of sour cream
4 cups chicken, cubed (1 rotisserie chicken, meat picked off the bone, shredded)
1 teaspoon chopped parsley
1 teaspoon fresh chopped thyme
salt and pepper

Topping

2 tablespoons butter, melted
1 cup breadcrumbs (I used Panko)
½ cup Parmesan cheese, grated
1 teaspoon fresh chopped parsley

Preheat the oven to 350.
Bring water to a boil and cook noodles until al dente. Drain and set aside in colander.
Melt 2 tablespoons of better in a sautee pan over medium heat. Add the onions and cook until lightly browned, about 5 minutes. Add the mushrooms, ½ teaspoon salt and some pepper. Cook until most of the water has evaporated out of the mushrooms. Stir in the remaining 4 tablespoons of butter and let it melt.
Add the flour and stir until it becomes lightly browned, about 2 minutes.
Add the garlic and cook about 30 seconds.
Gradually whisk in broth and sour cream. Let it cook 5 to 7 minutes, but don’t let it boil, you just want it to thicken.
Stir in the chicken, noodles, parsley & thyme. Season with salt and pepper if desired.
Transfer the filling into a greased 3-quart baking dish while you prepare the topping.
To make the topping:
Mix all the topping ingredients in a bowl and sprinkle on top of the casserole.
Bake until browned and bubbly, about 30 minutes. Let cool for about 5 minutes before serving.