Making Classic Meatloaf is a simple and enjoyable process. Follow these steps for a delicious outcome:

1. Preheat Oven: Preheat your oven to 350°F (175°C) and prepare a loaf pan by greasing it lightly.

2. Mix the Meat: In a bowl, combine the ground beef, breadcrumbs, chopped onion, minced garlic, and chopped parsley.

3. Add Wet Ingredients: In another bowl, whisk together the milk, eggs, Worcestershire sauce, salt, and pepper until well blended.

4. Combine Mixtures: Pour the wet mixture into the meat mixture. Use your hands to gently combine everything until just mixed—don’t overwork the meat.

5. Shape the Loaf: Transfer the mixture into your prepared loaf pan, shaping it into a loaf shape.

6. Prepare the Glaze: In a small bowl, mix the ketchup, brown sugar, and mustard (if using) together. Spread a layer over the top of the meatloaf.

7. Bake: Place the meatloaf in the preheated oven and bake for 1 hour, or until the internal temperature reaches 160°F (70°C).

8. Rest the Loaf: Once done, take it out of the oven and let it rest for about 10 minutes before slicing. This step will help keep the juices inside.

9. Slice and Serve: Cut the meatloaf into thick slices and prepare to serve.