Preheat oven to 400F.

In large mixing bowl combine ground beef, onions, brown sugar and Worcestershire sauce using your hands.

Add bread crumbs and egg to the meat mixture and continue mixing it with your hands.

Press the meat mixture evenly into an 8 inch square baking dish.

Spread the mashed potatoes over the meat using a rubber spatula.

Sprinkle the grated cheese on top followed by the bacon.

Cover the dish with aluminum foil and place in oven for 30 minutes.

Remove foil and continue cooking for another 10 minutes.

Remove from oven and allow to cool for a few minutes before slicing and serving.