01 -
Heat your oven to 350°F (175°C).
02 -
In a large bowl, toss together the beef, breadcrumbs, Parmesan, egg, milk, onion, garlic, seasoning, Worcestershire, salt, and pepper. Mix until it's all one texture.
03 -
Spread out parchment paper (or plastic wrap). Flatten the meat mix evenly into a rectangle, keeping it about an inch thick all around.
04 -
Scatter the mozzarella over the meat rectangle but stop half an inch away from the edges.
05 -
With the parchment paper acting as a helper, tightly roll the meat mixture. Seal the edges by pinching them, and then place the loaf seam-side-down into a baking dish.
06 -
Generously coat the surface of the meatloaf with ketchup.
07 -
Bake the meatloaf for about an hour. It's ready when a thermometer stuck in the middle hits 160°F (70°C).
08 -
Take it out of the oven, let it sit for 10 minutes to settle, add a sprinkling of parsley, slice it up, and serve warm.