Let’s start with the story behind this Potato Leek Soup. It began with a squintingly-bright Sunday morning we spent on the paradise of Coronado Island, San Diego, four years ago. My daughter led us on a run past the regal Hotel Del Coronado (where Marilyn Monroe sizzled in “Some Like it Hot”), past magnificent Mission-style clay-roofed homes, and along pristine, underused sidewalks. About half way around the loop, my daughter spied a bundle of plump, fresh, organic leeks demurely lying on a strip of grass beside the sidewalk. Had there been a gentle leek sunshower? My daughter picked them up. Upon closer examination, we surmised that they had more likely arrived by limo. These…