Preheat the oven to 350°F (175°C) and grease a loaf pan.

In a large mixing bowl, combine ground beef, stuffing mix, beaten eggs, milk, and chopped onion. Add minced garlic, salt, and pepper; mix gently.

Transfer the meat mixture into your prepared loaf pan, shaping it into a neat loaf.

Spread ketchup evenly over the top of the meatloaf.

Bake for about 60 minutes until the internal temperature reaches 160°F (71°C).

Remove from oven and let rest for 10 minutes before slicing and serving warm.