The original: I don't want to cut and paste it here, because it's at a food magazine website, so I'll link it. This sandwich looks damn good. Big Sandwich
Now, there is a lot more you can do with this. Here are some things I think might make a great sandwich of similar construct:
roasted red pepper
marinated mushrooms or artichoke hearts
All on a similar loaf of french bread, or sourdough.
OK, let's have it; what would YOU do?