I had never heard of a loose meat sandwich until recently and honestly when I heard the name my first thought was "sounds weird".
First things first, bacon.
I didn't cook them thoroughly, I wanted a little bite left to them so they'd be reminiscent of the raw ones you usually get on a burger. But it can be done however you like, of course. Then some ketchup and mustard, because I like to keep it simple.
steak and cheese kind of thing. That will be good. I wound up putting lettuce on it, I had meant to put some pickles on there too but it disappeared before I remembered.