I'm making what my grandmother called Poor Man's Dish. Her large family ate it during the Depression. You layer tomato sauce (watered down a bit), sliced potatoes, sliced onions, a slice or two of bacon, and then cover it with slices of American cheese. Salt and pepper each layer until you reach the top of the baking dish. Cover with foil and bake for 1 hour at 350, then uncover and bake for another hour.
It was a way to eat lots of potatoes to fill you up with a little flavor. I think my family is the only one that makes this dish. At least I think so...there are probably many variants of it out there.