Stuff the UNCOOKED manicotti shells with this cheesy mixture.
It's a bit of a chore but if you're willing to make a bit of a mess it's
not so difficult.
Then pour about half of the tomato sauce into a baking dish.
Arrange the manicotti in the dish on top of the sauce, then pour the rest
of the sauce over them and bake in a 400 degree oven for 20 minutes.
Before serving, take off the cover, sprinkle with more Parmesan, and bake
uncovered for a few minutes.