Preheat your oven to 400°F.
In a large bowl, combine the ground chicken, Parmesan cheese, breadcrumbs, parsley, onion, garlic, egg, salt, pepper, oregano, and basil. Mix until well combined.
Using your hands, form the mixture into meatballs about 1.5 inches in diameter and place them on a baking sheet lined with parchment paper.
Bake for 20 minutes or until the meatballs are cooked through and golden brown.
While the meatballs are baking, heat the marinara sauce in a saucepan over medium heat.
Once the meatballs are done, add them to the sauce and let them simmer for 5 minutes.
Serve the meatballs topped with shredded mozzarella cheese. If desired, place them under the broiler for 2-3 minutes to melt the cheese until bubbly and golden.