Preheat your oven to 400°F (200°C).
In a large bowl, combine ground turkey, breadcrumbs, and Parmesan cheese.
Add chopped parsley, minced garlic, egg, salt, pepper, and Italian seasoning.
Mix all ingredients until well combined.
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 cooked through.
In a saucepan, heat marinara sauce over medium heat.
Once meatballs are cooked, add them to the sauce and simmer for 5 minutes.
Serve hot, garnished with additional parsley if desired.