Damn, I'm late on this thread...
Swiss cheese on rye (preferably marble rye) with some dijion mustard, thinly sliced red onion and a little bit of lettuce. A little potato salad on the side (no egg please) and a frosty glass of Mug root beer.
If you are ever in the Glendora area, check out The House of Sandwiches - Glendora, CA
Argentinian deli with ridiculously good sandwiches. Milanesa sandwich is so good and dont forget to try a beef empanada. So good, just like the way my grandma would make them.