Can you imagine eating the same lentil soup at your desk for lunch virtually every workday for almost two decades? I couldn’t, at least not until I talked to Reid Branson, a Seattle nurse manager who has been doing just that. The soup is from Crescent Dragonwagon’s 1992 book “Dairy Hollow House Soup & Bread,” and Branson fell so in love with it that it changed his lunch routine for the rest of his professional life.