A comforting layered casserole combining seasoned ground beef, creamy mashed potatoes, and savory meatloaf flavors all in one hearty bake.

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Preheat oven to 375 °F (190 °C).
In a large skillet over medium heat, cook ground beef with diced onion and garlic until beef is browned and onion is soft, about 5–7 minutes. Drain excess fat.
Season beef mixture with Worcestershire sauce, Italian seasoning, salt, and pepper; stir to combine.
Spread seasoned beef evenly in the bottom of a greased 9‑inch by 13‑inch baking dish.
In a separate bowl, combine mashed potatoes, shredded cheddar, and sour cream until smooth.
Spoon mashed potato mixture over beef layer and smooth the top.
Drizzle ketchup on top in a zigzag pattern.
Bake for 20–25 minutes until casserole is heated through and cheese is melted.
Optionally, broil 2–3 minutes to get a slight golden top—watch closely to avoid burning.
Remove from oven, let rest 5 minutes, then garnish with chopped parsley before serving.

Make ahead: assemble in dish, cover, and refrigerate up to 24 hours; bake when ready.
Swap mashed potatoes for cauliflower mash to lighten it up.
Use leftover meatloaf mix or roasted ground beef as the base layer.
Add veggies like green beans or corn in between layers for extra nutrition.
Leftovers reheat well in microwave or oven; cover when reheating to retain moisture.