Macaroni Beef Casserole

This is a big batch of an easy casserole I made. Of course it can easily be varied by: type of pasta, type of meat, vegetables, sauce, spices and seasonings, add-ins (cheese, sour cream, etc.), but here is what I did:

Cook two bags of macaroni pasta in boiling water until tender.
Meanwhile, cook one package of ground pork in a little oil in a large saucepan until fully cooked. Stir in two large green peppers, diced, one package of sliced button mushrooms, and one can of seasoned diced tomatoes (with juice). Add in three packages of chili seasoning and bring mixture to a boil. Simmer for a few minutes until vegetables are tender.

Pour the drained pasta into a large casserole dish, pour meat mixture over top. Stir in a couple cups of tomato sauce of choice. Mix well. Top with cheese if desired. Bake immediately to heat through, or cover and place in the fridge until ready to bake later.