Start water boiling for potatoes. Preheat oven to 400degF.
Add potatoes to boiling water.
In a mixing bowl, combine hamburger steak ingredients. On a large parchment paper covered baking sheet, press meat mixture out to even layer (about ¾inch thick). Place in oven and bake for 30 minutes.
In a large saute pan over medium-high heat, add bacon, onions, salt pepper and parsley. Cook until bacon is crisp, then add butter. Once melted add corn starch and let cook another 3 minutes. Next whisk in beef broth. Reduce heat to medium-low, add mushrooms and Worcestershire. Cover and let simmer until ready to serve, stir occasionally.
Carefully remove hamburger steaks from oven and drain off excess grease. Cut into 6 equal squares.
Once the potatoes are fork tender, gently drain in colander. Add to clean bowl with remaining potato ingredients. Mix and mash to desired level of mashed.
Add a portion of potatoes to the plate. Place a square of hamburger steak on top and then ladle on gravy.