Follow these simple steps to create the Ultimate Loaded Potato Meatloaf:

1. Preheat the Oven: Set your oven to 350°F (175°C) and prepare a loaf pan by lightly greasing it.
2. Combine Meat Mixture: In a large bowl, combine the ground beef, cooled mashed potatoes, shredded cheddar cheese, milk, chopped green onions, breadcrumbs, ketchup, egg, minced garlic, salt, black pepper, and Worcestershire sauce. Mix until well integrated.
3. Shape the Loaf: Transfer the mixture to the prepared loaf pan. Shape the mixture into a loaf by pressing it evenly into the pan.
4. Add Cheese Topping: Sprinkle additional shredded cheddar cheese over the top of the meatloaf to give it a cheesier finish.
5. Bake: Place the loaf pan in the preheated oven. Bake for approximately 1 hour or until the internal temperature reaches 160°F (70°C) and the juices run clear.
6. Rest the Meatloaf: After baking, remove the meatloaf from the oven and let it rest for 10-15 minutes. This resting period allows the juices to distribute evenly, ensuring a moist and flavorful result.
7. Slice and Serve: Carefully slice the meatloaf into thick pieces using a sharp knife. Each slice should showcase the wonderful layering of meat and cheesy potato goodness.
8. Garnish: If desired, serve the slices topped with a dollop of sour cream and a sprinkle of fresh chives for added flavor.

By following these easy steps, you will create a loaded potato meatloaf that your family will rave about.