In a large mixing bowl, carefully combine the ground chicken, grated Parmesan cheese, Italian seasoned breadcrumbs, chopped parsley, egg, minced garlic, dried oregano, salt, and black pepper. Use your hands to mix the ingredients together thoroughly, being careful not to overmix to maintain a tender texture.
Preheat a large skillet over medium heat. Add a couple of tablespoons of olive oil, ensuring the bottom is evenly coated for frying.
With your hands, shape the chicken mixture into meatballs; aim for approximately 1 to 1.5 inches in diameter for even cooking.
Once the skillet reaches a medium-high temperature, add the meatballs to the skillet in batches, ensuring not to overcrowd the pan. Cook each batch for about 5-7 minutes on each side, or until they achieve a beautiful golden brown color and are cooked through.
Once browned and cooked, gently transfer the meatballs to a baking dish.
While you prepare the next steps, preheat your oven to 375°F (190°C).
Evenly pour the marinara sauce over the meatballs in the baking dish, ensuring each meatball is well coated. Generously sprinkle the shredded mozzarella cheese over the top of the sauce.
Place the baking dish in the preheated oven and bake for 15-20 minutes, or until the mozzarella cheese is bubbly and has developed a delightful golden color.
Once baked, carefully remove the dish from the oven and allow it to cool slightly for a few minutes before serving.
Notes
For an enticing presentation, serve over spaghetti with fresh parsley and additional Parmesan.