Great sandwiches don't happen by accident: You've got to balance moistness and crunch, weigh toppings and main components, choose bread that will make each element shine, and construct them so that every bite yields the ultimate satisfaction. Here are six expertly crafted sandwiches—equally great eaten at home or packed for a trip—from masters of the art form. Some get even better after resting in the backseat for a while…if you can wait that long.
