Preheat your oven to 190°C (375°F) and line a baking sheet with parchment paper.

In a large mixing bowl, combine ground chicken, grated Parmesan cheese, breadcrumbs, parsley, minced garlic, beaten egg, dried oregano, salt, pepper, and whole milk.

Gently mix until just combined; avoid overmixing to maintain tenderness.

Shape the mixture into four mini loaves and place them on the prepared baking sheet.

Drizzle extra virgin olive oil over each loaf and sprinkle mozzarella cheese on top if desired.

Bake in the preheated oven for 25 to 30 minutes or until golden brown and cooked through.