01 -
Preheat the oven to 350°F. Line a rimmed baking sheet with parchment paper or foil to simplify cleanup.
02 -
Heat olive oil in a medium skillet over medium heat. Add the finely chopped onion and sauté for 5 to 7 minutes until golden and softened. Remove from heat and let cool.
03 -
In a large bowl, gently combine ground beef, cooled onions, eggs, minced garlic, ketchup, parsley, panko breadcrumbs, milk, salt, Italian seasoning, and black pepper. Mix just until evenly incorporated to prevent a dense texture.
04 -
Transfer the meat mixture onto the prepared baking sheet and shape into a loaf approximately 8 inches long, 4 inches wide, and 3 inches tall. Bake uncovered at 350°F for 40 minutes.
05 -
While the meatloaf bakes, whisk together ketchup, white vinegar, brown sugar, garlic powder, and onion powder until smooth.
06 -
Evenly spread the glaze over the partially baked meatloaf. Return to the oven and bake an additional 20 minutes, or until the internal temperature reaches 160°F.
07 -
Remove the meatloaf from the oven and let rest for 10 to 15 minutes to allow juices to redistribute for easier slicing and enhanced moisture.