Preheat your oven to 350°F (175°C).

In a large mixing bowl, combine the ground beef, diced onion, brown sugar, Worcestershire sauce, bread crumbs, and egg.

Combine all the ingredients completely, ensuring everything is evenly blended.

Grease a baking dish and evenly press the meat mixture into the bottom to create the meatloaf layer.

Bake the meatloaf for 25-30 minutes or until it is browned and mostly cooked through.

While the meatloaf is cooking, prepare the garlic-flavored instant mashed potatoes according to the package instructions using water and milk.

Once the meatloaf base is ready, spread the prepared mashed potatoes evenly on top of the meat layer.

Sprinkle the shredded cheddar cheese blend evenly over the mashed potatoes.

Scatter the bacon bits over the cheese layer for added flavor.

Return the dish to the oven and bake for an additional 10-15 minutes, or until the cheese is melted and bubbly.

For extra crispness, broil the casserole for 2-3 minutes at the end, watching carefully to avoid burning.

Let the casserole cool for a few minutes before slicing into it.

Serve warm and enjoy the savory combination of flavors in every bite!