The cafe across the street does one that's guaranteed to fill the empty spot on a winter day:
bun
fried egg (yolk runny, of course)
thick sliced bacon
cheese
ham
middle bun
thick sliced bacon
cheese
hamburger patty
bun
We do this one pretty regularly in the summer:
toasted bun
carmelized onions
grilled mushrooms
juicy Lucy patty with smoked gouda (cheese is sealed between two thin patties and melts while it's grilled)
toasted bun
