Italian sausage and pasta casserole

I had to come up with a name for this dish since several friends asked for the recipe.  It's one of those dishes that I pulled together from what I had available in the pantry.  It's really an easy riff on my aunt's delicious baked ziti.  It's also one of those dishes that you can expand to easily feed more and one with no real recipe.  Enjoy!

Italian Sausage and Pasta Casserole
serves 6

1 box of pasta (I used rotini, all I had, and actually about 2/3 of the box)
4 Italian sausages
1/2 onion, chopped
3 cloves garlic, minced
28 oz. can of crushed tomatoes
Italian seasoning, salt & pepper
shredded mozzarella cheese

Cook the pasta according to the directions (slightly undercooked is better).  Cut the sausages into pieces.  In a large skillet, cook the onions and garlic in oil until just soft; add the sausage and cook thorough.  Add the crushed tomatoes and season with Italian seasoning, salt, and pepper.  Let simmer for a few minutes.  Mix the cooked pasta and sauce in a 9 x 13 dish.  Add a couple of handfuls of mozzarella cheese and stir.  Top with more mozzarella.  Bake at 350* for 25 minutes or until warm through.

You could also top with Parmesan as well, which I meant to do but forgot.  You can add more or less onion and garlic, more sausage, whatever you need to do to feed your family how they'd like it.