Step 1

Preheat oven to 400º F.

Step 2

In a large bowl, combine ground beef, onion, garlic and Worcestershire sauce using two forks or your hands.

Step 3

Season generously with salt and pepper, then work in breadcrumbs and egg.

Step 4

Transfer ground beef to an 8-inch square baking dish and press it into an even layer.

Step 5

Spread mashed potatoes on top of ground beef mixture, then top with cheddar cheese and bacon bits.

Step 6

Cover baking dish with aluminum foil, then place in oven. Bake for 30 minutes, then remove aluminum foil and bake for another 10-15, or until cheese is melted and bubbly.