Preheat your oven to 400°F / 200°C and position the rack in the middle of the oven. Line a baking tray with parchment paper. Alternatively you can use a grill skillet for baking. Keep aside.

Mix together oats and milk in a large bowl.  Add the remaining ingredients for the meatloaf : ground beef, onion, garlic, parsley, Mozzarella  cheese, tomato paste, eggs, Worcestershire sauce, Dijon mustard, ground black pepper, paprika, herb mix and salt. Mix just until combined. Don't over-mix!

Transfer the meat mixture into the loaf pan  and press lightly to shape a loaf. Turn it out onto the prepared baking tray.

Combine all the ingredients for the meatloaf glaze: tomato sauce, ketchup, brown sugar, vinegar, onion powder, Worcestershire sauce and black pepper.

Coat with half of the glaze, using a spoon. Bake for 60 minutes, then remove from the oven and pour the remaining meatloaf sauce over the meatloaf. Again spread it evenly with a spoon.

Return to the oven and bake further 15 minutes. Allow the meatloaf rest for 10 minutes before slicing. This will prevent it from falling apart.

Serve with Mashed potatoes, Instant Pot Basmati rice, Jasmine  rice, or over cacio e pepe.