Optomen for Channel 4, 1 October 2019 to 27 April 2021 (10 episodes in 3 series)
The Channel 4 press release said:
Eliana Capitani
Although it wasn't mentioned in the press release quoted above, the episode on Snickers was evidently meant to air as part of the first series, since clips from it appear in the original opening montage. It eventually aired a year and a half later as the final episode of series three - and the final episode overall. The second and third series (aside from the Snickers episode) share an opening montage containing shots from both series - though in the circumstances it would have been fairly obvious that they were a single production batch anyway, since those six episodes must have been completed during the short window between Series 1 and the Covid-19 pandemic.
It's fair to say that some chefs struggled more than others - serial Great British Menu sourpuss Daniel Clifford only won his second episode against Claude Bosi after Bosi gave up and served actual Shreddies, admitting his deception only after having served them.