Cook pasta shells according to instructions on the package. Drain, keep warm.
Preheat oven to 350° F.
Spread pasta sauce on the bottom of 13" x 9" baking dish. Set aside.
In a medium mixing bowl, mix together ricotta cheese, mozzarella cheese, egg, garlic, seasoning, salt, pepper and chopped spinach.
Fill each pasta shell with cheese filling and arrange in the sauce.
Sprinkle additional mozzarella cheese over each shell.
Bake for 20 to 25 minutes or until the sauce is bubbling on the edges.
Let sit for 10 minutes in room temperature before serving.
