Beef and Mushroom Casserole

No idea what a good name would be, I just walked through the store and bought what I thought would work good together.

Penne pasta (enough to cover the bottom of a 9 x 13 casserole dish)
1 Jar(can) Mushroom pasta sauce (I used Chunky Mushroom Ragu and if you have time you could use a homemade sauce.)
1 lb ground beef
Fresh mushrooms, I used one package of baby portabellas
1/2 medium onion chopped
5 tsp garlic
oregano (to your taste)
2 tbsp olive oil
Mozzarella Cheese
Vodka (optional)

Cook up your noodles and ground beef.
Layer pasta on bottom of casserole dish and the ground beef on top of that.
Preheat oven to 325.

Sauce:
Over medium heat, heat the oil in a skillet and add garlic for 1 minute
Next add the onion and the mushrooms into the pan, saut? until the mushrooms become tender.

Add the pasta sauce to the skillet and let simmer until heated through,
I added a splash of vodka here.
Add the oregano to the sauce, stir and let simmer a few more minutes.

Pour the sauce over the pasta and ground beef smoothing it over the top.
Cover the sauce with the mozzarella cheese until all covered.

Put dish into the oven for 20-30 minutes or until the cheese is to your liking.