Preheat oven to 375°F (190°C) and lightly grease a baking dish or loaf pan.

In a large bowl, combine ground chicken, breadcrumbs, parmesan, milk, egg, garlic, oregano, parsley, salt, and pepper.

Mix gently until just combined. Do not overmix.

Shape into 4 mini loaves or form 1 large loaf in the prepared pan.

Brush the top lightly with olive oil.

Bake at 375°F for 25–30 minutes (mini loaves) or 45–55 minutes (large loaf).

Cook until internal temperature reaches 165°F (74°C).

During the last 5 minutes, top with shredded mozzarella if using.

For a sauced version, spoon warmed marinara over the loaf and bake 5–10 more minutes.

Remove from oven and let rest 5–10 minutes before slicing.