The holidays are past, winter has taken hold, the polar vortex is paying us an unwelcome visit and we’re ready for comfort food. Soup is the culinary equivalent of a cozy curl-up before a crackling fireplace. Sure, you could open a can, pour out the contents and zap it in the mic, but see how satisfying it is to make a pot of the hot stuff from scratch. Here’s a simple, hearty potato-leek recipe from Julia Child, who taped her famous The French Chef series at WGBH back in the day!