For almost her entire professional life Ruth Reichl has been able to combine her two loves, food and writing. A long time restaurant critic for the Los Angeles Times and the New York Times, Reichl became editor of Gourmet Magazine in 1999. Her books book have also been a combination of memoir and food, but in her latest offering, Not Becoming My Mother, Reichl looks back at her mother’s life through almost a century of letters and how her challenges influenced her daughter’s career. On Friday, Reichl stopped by the Music Hall in Portsmouth for the next installment of our Writers on a New England Stage series. Today we bring you part of that performance.