1. Preheat your oven to 375°F. Grease a 9×13-inch baking dish and set aside.
2. In a large bowl, combine the ground beef, breadcrumbs, milk, egg, garlic powder, onion powder, salt, and pepper. Mix until well combined, but be careful not to overmix, as this can make the meatloaf tough.
3. Press the meat mixture into the prepared baking dish, spreading it evenly.
4. Bake for 25 minutes. You’ll know it’s ready when the edges are browned and the center is firm to the touch.
5. While the meatloaf is baking, mix the mashed potatoes with sour cream, half of the shredded cheddar cheese, and half of the cooked bacon.
6. Remove the meatloaf from the oven and spread the mashed potato mixture over the top.
7. Sprinkle the remaining cheese and bacon on top of the mashed potatoes.
8. Return to the oven and bake for an additional 15 minutes, or until the cheese is melted and bubbly.
9. Garnish with chopped chives before serving.

Cooking tip: To save time, you can use leftover mashed potatoes or instant mashed potatoes in this recipe. It’s all about making this meal as easy and enjoyable as possible!