Combine all of the cheese ingredients in a food processor except for 1 cup of the mozzarella cheese.
Stuff the pasta shells with approximately 1 tablespoon each of the cheese mixture.
Pour half of the spaghetti sauce in the bottom of a glass baking dish. Arrange the stuffed pasta shells in the dish (single layer). Pour remaining sauce over shells (optional). Sprinkle the remaining 1 cup of mozzarella cheese over the shells.
Cover dish with foil. Bake at 350 degree for 30 minutes.