Preheat your oven to 400°F (200°C).
In a large bowl, combine ground chicken, breadcrumbs, Parmesan, parsley, egg, garlic, salt, pepper, and Italian seasoning.
Mix the ingredients until well incorporated.
Form the mixture into meatballs, about 1.5 inches in diameter.
Place the meatballs on a baking sheet lined with parchment paper.
Bake in the preheated oven for 20-25 minutes, or until golden brown.
Meanwhile, heat the marinara sauce in a saucepan over medium heat.
Once the meatballs are cooked, add them to the sauce and simmer for 5 minutes.
Serve hot, garnished with extra parsley or Parmesan if desired.
Enjoy your delicious chicken meatballs!