Preheat your oven to 375°F (190°C) and prepare a loaf pan lined with parchment paper.

In a skillet, warm olive oil over medium heat and sauté onion, bell pepper, and celery for 5-7 minutes until soft. Add minced garlic and cook for an additional minute.

In a mixing bowl, combine ground meats, sautéed vegetables, breadcrumbs, Parmesan, eggs, and herbs. Season with salt and pepper and mix gently.

Transfer the mixture to the loaf pan, shape it, and spread half of the tomato sauce on top. Bake for about 1 hour or until internal temperature reaches 160°F (71°C).

Let the meatloaf rest for 10-15 minutes before slicing and serving with the remaining tomato sauce.