Step 1

Preheat the oven to 375 degrees F. Coat a 9"x13" baking pan with cooking spray.

Step 2

Spread 1 1/2 cups of the marinara sauce in an even layer in the bottom of the pan.

Step 3

Place the ricotta cheese, 1 1/2 cups of mozzarella cheese, Italian seasoning, egg, salt, pepper and parmesan cheese in a bowl. Stir to combine.

Step 4

Fill each shell with the ricotta mixture and place in the baking dish.

Step 5

Spoon the remaining marinara sauce over the shells, then sprinkle the other 1 1/2 cups of cheese over the top.

Step 6

Cover the dish with foil. Bake for 20 minutes. Uncover the pan, then bake for an additional 10 minutes or until cheese is melted and starting to brown.

Step 7

Sprinkle with parsley, then serve.