Preheat the oven to 350°F (175°C).

In a mixing bowl, combine ground beef, bread crumbs, egg, onion, garlic, salt, pepper, and Worcestershire sauce. Mix until well combined.

Transfer the meat mixture to a baking dish and shape it into a loaf.

Boil the cubed potatoes in salted water until tender, about 15 minutes. Drain and return to the pot.

Mash the potatoes and mix in sour cream, half of the cheddar cheese, and half of the green onions.

Spread the mashed potato mixture over the meatloaf in the baking dish.

Sprinkle the remaining cheddar cheese and crumbled bacon over the mashed potatoes.

Bake in the preheated oven for 45 minutes, or until the meatloaf reaches an internal temperature of 160°F (70°C).

Garnish with remaining green onions before serving.