Tammy made a version of this for us the first time in Niobrara and for Kumy it was love at first bite. It’s perfect for cooking at a cabin, because it literally only takes one pot.  For a vegetarian version, just leave out the sausage.  (You may want to add a pinch of red pepper flakes if you leave out the sausage.)

1 1/4 lb. spicy bulk Italian sausage
1 24 oz. jar good spaghetti sauce
hot water

1 package rotini
1/2 cup parmesan
2 cups mozzarella

Brown meat in a dutch oven or large pot.

Add spaghetti sauce. Fill the spaghetti sauce jar with hot water, and add to the pot, along with the rotini and parmesan. Stir well, cover and bake at 400 for 30 minutes.

Remove from oven, sprinkle Mozzarella on top, and return to oven for 10 more minutes without a cover.