Preheat oven to 350 degrees. Prepare three round cake pans with parchment paper.
Mix together the ground chuck, onion, bread crumbs, eggs, worcestershire sauce, milk, salt, and pepper until well blended. Divide equally between the three cake pans and press into a flat layer.
Bake for 25 to 30 minutes or until the meatloaf reaches an internal temperature of 165 degrees. All to cool slightly. Remove any beef drippings and gently pat dry with paper toweling to help the mashed potatoes to stick.
Layer the meatloaf with mashed potatoes just like you would ice a cake. Use almond slices to garnish.
Notes
Note: I reserved about 2 cups of mashed potatoes to pipe using an open star tip.