01 -
Preheat your oven to 375°F (190°C). Grease a 9×13 inch baking dish.
02 -
In a large bowl, combine the ground beef, ground pork, onion, breadcrumbs, milk, egg, Worcestershire sauce, salt, pepper, and garlic powder. Mix until just combined.
03 -
Press the meat mixture evenly into the prepared baking dish.
04 -
Spread the mashed potatoes evenly over the meat mixture.
05 -
Sprinkle the shredded cheddar cheese, crumbled bacon, and chopped green onions over the mashed potatoes.
06 -
Bake in the preheated oven for 35-40 minutes, or until the cheese is melted and bubbly and the meat is cooked through.
07 -
Allow the casserole to cool for a few minutes before slicing and serving.