Mushroom Pastitsio

I have no idea what a pastitsio actually is, beyond delicious, but lately Cooking Light has had a couple of recipes for it that have been amazing. Here is my take on it... It's a cheesy wonderful casserole, with excellent leftovers.

Ingredients:
4 cups cooked rotini, whole wheat works well
16 ounces baby bellas, cremini mushrooms, or regular mushrooms, or a mix
1 yellow onion
4 cloves garlic or equivalent garlic powder
1 tsp Penzey's Bavarian Blend or 2 tbsp chopped fresh parsley
1/3 tsp kosher salt
1 cup tomato sauce
2 cups milk
2 tbsp flour
1 brick lowfat or fat free cream cheese
1/2 cup grated parmesan
1/2 cup grated mozzarella (reduced fat is okay but not fat free)

Mince the onion and chop the mushrooms finely. Saute together in a skillet over medium-high heat, stirring constantly, until the mushrooms give up their liquid and it mostly evaporates. Add the garlic, salt, and herbs. Transfer to a bowl and stir in the tomato sauce.

Add the milk into the skillet and whisk the flour in while it's still cool (you can't whisk flour into a hot liquid). Cook and stir until bubbly and thick. Turn the heat down to medium-low and add the cream cheese and parmesan, stirring until they melt and become smooth. Pour the cheese sauce over the pasta and stir.

Pour half of the pasta mixture into a medium sized casserole dish. Spread the mushroom mixture on top, then add the rest of the pasta mixture on top of that. Finally, sprinkle the mozzarella on top of the whole thing.

Bake at 400 until the cheese melts, then serve.