Sébastien Demorand, French journalist and food critic.
https://www.nouvelobs.com/food/20200121.OBS23746/sebastien-demorand-l-ancien-jure-de-masterchef-est-mort.html#modal-msg
https://www.rtl.fr/culture/medias-people/sebastien-demorand-critique-gastronomique-est-decede-a-l-age-de-50-ans-7799917525
He was a member of the jury on the French version of MasterChef, and also appeared as a special guest in episode 18 of the second season of MasterChef US.