01 -
Preheat your oven to 175°C (350°F), and get a rimmed baking sheet covered with foil or parchment for easy cleanup.
02 -
Heat a medium skillet over medium heat, add 1 tsp olive oil, and toss in the onions. Stir them now and then until golden and tender (about 5 to 7 min). Let them cool on a separate plate.
03 -
In a wide bowl, toss in the ground beef, cooled onions, eggs, parsley, garlic, milk, breadcrumbs, ketchup, Italian seasoning, pepper, and salt. Gently combine with your hands. Don’t overdo it, or it’ll turn out too dense.
04 -
Place the meat blend on the prepped baking sheet and shape it into a loaf about 20x10x7.5 cm (8x4x3 inches). Bake it (uncovered) for 40 minutes.
05 -
Stir the ketchup, garlic powder, brown sugar, onion powder, and vinegar in a tiny bowl until it’s all smooth and even.
06 -
Coat the loaf with your prepared sauce spread on top, and then pop it back in the oven for another 20 min. Keep baking until it hits 71°C (160°F) inside. Let it sit for 10-15 min before slicing it up.