I once made the double cheese on toast double cheese burger
Basically you make two grilled cheese sandwiches (i.e. bread – cheese – bread)
Put one on the bottom, put a burger on top, add cheese. Add a second burger and cheese. Put second grilled cheese sandwich on top.
So (vertically)
bread
cheese
bread
cheese
burger
cheese
burger
bread
cheese
bread
Tastes great, unlikely to be healthy