Preheat your oven to 350°F (175°C).

In a large mixing bowl, combine the ground beef, egg, finely chopped onion, milk, breadcrumbs, ketchup, fresh parsley, granulated garlic, salt, and pepper. Mix gently until just combined.

Transfer the mixture to a loaf pan or greased casserole dish and shape it into a loaf.

In a small bowl, mix ketchup and brown sugar to create the glaze. Brush it over the meatloaf.

Bake uncovered for approximately 45 minutes, until the internal temperature reaches 160°F (71°C).

Let the meatloaf rest for 5-10 minutes before slicing.

Slice and serve with sides like creamy mashed potatoes or steamed vegetables.