Preheat the oven to 350?F (175?C).

In a large mixing bowl, combine the ground lamb, bread crumbs, beaten egg, chopped onion, minced garlic, chopped mint, salt, and black pepper.

Mix until well combined, but do not overwork the meat.

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

In a small bowl, mix together the ketchup, brown sugar, and Worcestershire sauce.

Spread the ketchup mixture over the top of the meatloaf.

Bake in the preheated oven for 60 minutes, or until the internal temperature reaches 160?F (70?C).

Let the meatloaf rest for 10 minutes before slicing and serving.