The perfect fried egg sandwich means different things to different people. Find just the right one and you are guaranteed bliss for many mornings (or late nights!) to come. For me, a lot has to do with the layering strategy (a well-thought-out stack can help keep layers from sliding out the side of the sandwich!), as well as how the eggs are cooked (I like mine fried with edges slightly crispy, and yolk just runny enough to coat everything when you take a bite, without getting lost to the plate). Another equally important factor is the inclusion of a little acidic tang to play off the fat of the egg yolk and cheese. My answer to this is mustard and pickles. I discovered these unconventional additions when I was in college in Montreal, and often frequented a burger joint called La Paryse. My favorite dish on the menu was the egg sandwich with pickles. Now, when I wake up a little rough around the edges and need a substantial meal to start the day, this is it.