Preheat your oven to 400°F (200°C).

In a large mixing bowl, combine ground chicken, breadcrumbs, Parmesan cheese, parsley, egg, minced garlic, salt, pepper, and onion powder.

Mix the ingredients until well combined.

Form the mixture into small meatballs, about 1 inch in diameter.

Place the meatballs on a lined baking sheet.

Bake in the preheated oven for 20 minutes or until golden brown.

While the meatballs are baking, heat marinara sauce in a saucepan over low heat.

Once cooked, remove meatballs from the oven and let them cool slightly.

Serve the meatballs with warm marinara sauce.

Garnish with additional parsley or Parmesan if desired.