OK, Phil, I'll reveal the correct answer later. Leyla Kazim presents 'The Food Programme' on BBC Radio 4. Here she is talking about some of the possible benefits of bitter food.
Kazem (also spelled Kadhem, Kadhim, Kazim, or Qazim; Arabic: كاظم) is an Arabic male given name, the pronunciation of the Arabic letter Ẓāʾ is often closer to a strong "d" sound, therefore the name's pronunciation differs based on the spoken varieties of Arabic and consequently in its transcription.
The form Kazim is most probably related with a Polish name Kazimierz.