Preheat your oven to 375°F (190°C).

In a large mixing bowl, combine ground chicken, grated Parmesan, minced garlic, breadcrumbs, egg, Italian seasoning, salt, and black pepper.

If desired, fold in shredded mozzarella cheese.

Shape portions of the meat mixture into 1.5-inch meatballs and place onto a parchment-lined baking sheet.

Brush tops with melted butter and sprinkle with grated Parmesan and minced garlic.

Bake in the preheated oven for 18-20 minutes until cooked through and golden brown.

Let rest for a few minutes, then garnish with chopped parsley and serve.