Preheat oven to 350 degrees F. Boil pasta shells and drain when cooked .
Place shredded chicken in a bowl. If you are using canned chicken, buy 2 large cans.
Add Italian seasoning and stir.
Stuff shells with chicken mixture. If you have extra chicken left over, just add some mayo, celery, and onion and enjoy some chicken salad tomorrow go lunch! :-)
Pour sauce over pasta shells.
Sprinkle mozzarella over sauce.
Sprinkle oregano on top.
Bake until cheese is melted, approximately 25 minutes. Serve and enjoy!