Japanese Egg Sandwich (Tamago Sando) たまごサンドIf you've found your way here, you're either in the know or a lucky m'fker. For those who have had the pleasantry of traveling to Japan to experience one in person, you know why we try so hard to duplicate this national treasure. It's the grab-and-go snack that is sold at every conbini (the convenience stores in Japan, ala 7-11).If you try to break it down in the most simple of ways, the magic lies in the fluffy, heavenly white Japanese bread along…