Meaty Pizza Casserole

I found this recipe via Pinterest.
I made it for a Sunday football gathering, with 8 people and there was plenty for everyone plus leftovers!

ingredients
1lb pasta (I used medium shells because I think they hold sauce/substance better)
1lb sweet Italian sausage, chopped into pieces
1 white onion, diced
2 26oz jars of spaghetti sauce (I used Wegmans Tomato & Basil)
1lb ham steak, cubed
1/2-1lb sliced pepperoni
16oz bag of shredded mozzarella
6 tbs grated parmesan cheese
2 tbs minced garlic
1 tsp dried oregano

directions

1. Preheat oven to 375 degrees.
2. Cook pasta in boiling water until al dente.
3. Cook sausage, onions, and garlic in a pan until any excess liquid is evaporated and the sausage is cooked through.
4. In a lightly greased 9x13 pan, pour 1/2 jar of sauce to coat the bottom of the pan.
5. Layer ingredients in the order listed below, spreading to evenly cover pan.
6. 1st layer: 1/3 pasta, 1/2 jar of sauce, 1/3 mozzarella cheese, 2 tbs parmesan cheese, sausage and onions.
7. 2nd layer: 1/3 pasta, 1/2 jar of sauce, 1/3 mozzarella cheese, 2 tbs parmesan cheese, ham.
8. 3rd layer: remaining pasta, remaining sauce, remaining mozzarella cheese, remaining parmesan cheese.
9. Place pepperoni on top to your desired coverage. (I overlapped the slices of pepperoni so the entire top was just a sheet of pepperoni).
10. Bake for 45 minutes.
11. Let sit for 5 minutes before serving.
12. Enjoy!