Interviewing a former White House executive chef, would love thoughts and ideas on what questions to ask

Hello,

I am interviewing a chef who spent 13 years as a Whitehouse Chef (1992-2005) and was executive chef during that time. I would love some interesting/thought provoking questions to ask him in regards to this and thought this community would have the expertise. Interviewing him for my interview show. Curious to see what suggestions for questions you guys have, thank you!