Mix thoroughly and set aside until ready to stuff the manicotti shells.
In a 9×13 pan, place enough sauce to cover the bottom well.
Stuff the filling into uncooked manicotti shells. (YES…uncooked! Eliminates an entire step from the way I learned and you really cannot tell the difference.) You can use a piping bag, a large freezer bag with the corner cut off, or just use your hands and a butter knife.
Have you noticed I have no pictures of that process? I really need to work on my blogging skills.
Place the filled shells in your baking dish and cover with the remaining sauce.
Cover with aluminum foil and bake at 350 degrees for 50 minutes. Remove the foil and bake for an additional 10 minutes. Top with freshly grated Parmesan cheese and enjoy!