Bake the fries according to the package directions.
In a large skillet over medium heat, cook the bacon- stirring occasionally, until done. Add the ground beef, breaking up as it cooks, and cook until the meat's completely browned. Strain the meat mixture until all the grease has drained, then return it to the skillet.
Add the ketchup, mustard, and Worcestershire sauce stirring until completely incorporated. Season with salt & pepper, to taste. Cover the skillet with a lid, remove it from heat, and set aside.
Transfer the cooked, crisp fries to a large serving platter of your choice. Spread half the lettuce evenly out over top of the fries. Spoon the beef mixture evenly out over the top, spreading as necessary to cover the fries.
Sprinkle the rest of the lettuce and the onion evenly out over top of the fries. Lastly, drizzle the cheese sauce evenly out over top.
Serve immediately, and enjoy!