Cook pasta shells according to package directions.
Do not overcook or they will break apart easily. (I usually cook about 12 minutes).
Drain in colander, spray with cold water to stop cooking process.
Spoon shells onto large cutting board or waxed paper to cool.
Meanwhile, in a bowl combine the egg, Ricotta cheese, spinach, 1 bag Parmesan cheese, salt, pepper, oregano and basil.
Mix well.
Spoon cheese mixture into shells.
Place stuffed shells into sprayed 10x15” baking dish.
You will have to layer some of the shells on top of others.
Pour spaghetti sauce over top of shells.
Sprinkle with remaining bag of Parmesan cheese to cover surface area.
Cover with foil and bake at 350° for 30-40 minutes or until heated through.