Preheat oven to 400°
Cook bacon in a 12 inch cast iron or other oven safe skillet over medium high heat. Remove bacon and place on paper towels to drain.
Brown your ground beef in the bacon grease over medium high heat.
As beef begins to brown, add onion, Worcestershire sauce and other seasonings. Stir to combine.
When beef is no longer pink and onion is soft, turn off the heat. Push beef and onion mixture to one side of skillet.
Place a single layer of potatoes, slightly overlapping, on the bottom of the skillet. Move beef and onion mixture on top of those potatoes and continue to lay potatoes on the bottom of the other side of the skillet, then spread beef and onion mixture evenly across the potatoes.
Place another layer of potatoes, slightly overlapping, on top of the beef and onion mixture.
Add the milk to the skillet and top with cheddar cheese.
Place skillet in oven and bake for 40 – 50 minutes until very little liquid remains and cheese begins to bubble and brown along the edges.
Top with crumbled bacon and parsley.