To begin, preheat your oven to 350°F (175°C). This will ensure that your meatloaf cooks evenly and to perfection.
In a large mixing bowl, combine the ground beef, breadcrumbs, chopped onion, minced garlic, beaten egg, milk, Worcestershire sauce, ketchup, salt, and black pepper. Mix well until all the ingredients are evenly incorporated. This is where the magic happens, as the flavors start to meld together.
Once the mixture is well combined, transfer it to a greased loaf pan. Shape the meat mixture into a loaf shape, making sure it is evenly packed.
Place the loaf pan in the preheated oven and bake for approximately 1 hour, or until the internal temperature reaches 160°F (71°C). This ensures that the meatloaf is cooked through and safe to eat.
While the meatloaf is baking, you can prepare a glaze to add an extra layer of flavor. In a small bowl, mix together 2 tablespoons of ketchup and 1 tablespoon of brown sugar. Spread the glaze evenly over the top of the meatloaf during the last 10 minutes of baking.
Once the meatloaf is cooked, remove it from the oven and let it rest for a few minutes before slicing. This allows the juices to redistribute, resulting in a moist and tender meatloaf.
Serve the meatloaf slices with your favorite sides and enjoy the comforting flavors of Grandma's Meatloaf.