In a bowl, combine ricotta cheese, Parmesan cheese, 1 cup mozzarella cheese, shredded chicken, egg, oregano, salt, and pepper together. Stir until well mixed.
Fill each cooked Manicotti with the chicken and cheese mixture carefully so that the shell doesn't tear (I fill a plastic bag and cut a small corner - this makes filling the Manicotti easier and then I just throw away the bag when I'm done).
Spray a 9 x 13 inch baking dish with cooking spray and place the stuffed Manicotti in it.
Pour the spaghetti sauce on top. Sprinkle with 1 cup of mozzarella cheese, and place basil leaves on top. Bake for 35 minutes or until hot and bubbly.
Notes
Cook the noodles BEFORE you fill them.
When filling Manicotti, I like to use a plastic baggie that can zip.
Make sure when cooking that Manicotti in the oven, that every part of the noodles are covered with sauce.
Want to make this ahead of time? Prepare everything up until it’s time to bake, cover with foil, and stick it in your fridge for up to 24 hours.
This recipe calls for skim ricotta cheese, but if you aren’t a fan of ricotta cheese, you could easily substitute it for cottage cheese.