Mary Margaret McBride, one of America’s original food personalities, started out as a radio journalist in the 1930s. Though she may not have invented the interview format, she became famous for it, and all the most newsworthy personalities of the day were guests on her show. She was so well-known by the 1950s that on an early I Love Lucy episode Ethel Mertz (Vivian Vance) went on a local television show pretending to be “Mary Margaret McMertz” to end
