1 (12-ounce) box uncooked jumbo pasta shells (if all of yours survive the boil this is enough, to be safe you may want 1 1/2 boxes)
2 cups chopped cooked chicken
2 cups fresh chopped spinach
1 onion, chopped
2 cloves garlic, minced
1 (15oz) container ricotta cheese
2 (8oz) packages cream cheese, softened (I think you could get away with one package)
1 (5oz) package shredded Parmesan cheese (about 1 2/3 cups)
1 large egg, lightly beaten
1 Tablespoon dried parsley flakes
1 teaspoon Italian seasoning
1/2 teaspoon salt
1/2 teaspoon pepper
2 cups shredded mozzarella cheese, divided
1 (26oz) jar prepared spaghetti sauce (this was just enough. If you like it saucier use more)