Preheat oven to 375°F (190°C). Cook manicotti shells as per package, drain, and set aside.
In a bowl, mix ricotta, shredded chicken, eggs, shredded parmesan, oregano, salt, and pepper.
Fill the cooked manicotti shells with the mixture using a spoon or piping bag.
Spread crushed tomatoes over the bottom of the baking dish.
Place stuffed manicotti in the dish and pour remaining tomato sauce on top.
Sprinkle with grated parmesan and a dash of Italian seasoning.
Cover with foil and bake for 25 minutes. Remove foil and bake another 10 minutes.
Let it rest for 5 minutes before serving.