01 -
Preheat the oven to 350°F (175°C). Lightly grease a 9x5-inch loaf pan to prevent sticking.
02 -
In a large bowl, combine ground beef, chopped onion, milk, bread crumbs, and egg. Season with salt and pepper. Mix thoroughly but avoid overmixing.
03 -
Transfer the meat mixture into the prepared loaf pan, shaping it evenly.
04 -
In a small bowl, mix ketchup, brown sugar, and mustard until well combined.
05 -
Pour the glaze over the meatloaf, spreading it evenly across the top.
06 -
Bake in the preheated oven for approximately 1 hour, or until the meatloaf is no longer pink in the center.
07 -
Remove from oven and let rest for a few minutes. Serve hot and enjoy!