Preheat the oven to 400°F and prepare a loaf pan or meatloaf pan with cooking spray or parchment paper. Set aside.
In a small mixing bowl, toss the cubed bread with the milk. Set aside for 3-4 minutes to absorb. Milk should be pretty well soaked up.
In a large mixing bowl, or the base of a stand mixer, combine soaked bread, onion, garlic, parsley, oregano and salt. Mix to combine into a paste.
Add the ground beef and sausage, breaking into small pieces.
Before mixing, top with Worcestershire sauce, lightly beaten egg, dry bread crumbs, Parmesan cheese, 1/2 cup shredded mozzarella and 1/4 cup marinara sauce.
Blend until just mixed, either using your fingers to toss or putting the stand mixer on low. Too much mixing will make your meatloaf tough, so only mix until barely blended.
Transfer meat mixture to cooking vessel of your choice, forming into a loaf as you go. You can make it free-form on a rimmed baking sheet, but I prefer using a meatloaf or bread loaf pan. Top with 1/2 cup marinara sauce.
Bake, uncovered, for 40 minutes. Remove and top with remaining shredded mozzarella cheese and another shake of Italian seasoning (if desired).
Cook for an additional 5 minutes. Allow to sit for 5-10 minutes before cutting and serving. Serve with additional marinara sauce, if desired.
If you've tried this recipe, come back and let us know how it was!