During the episode, Rimmer cooked guests a Massor dhal featuring fried prawns. He kept a separate portion without the prawns for the Countdown star.
'Taking the p**s'
However, the dish still contained ghee - a clarified butter often used in Indian cuisine which is unsuitable for vegans.
Many vegans took to social media to express their outrage, with one user commenting: "#Ghee isn’t Vegan! #SundayBrunch Weak apology too, nothing like taking the p**s out of Vegans it’s like the Piers Morgan school of mockery. Bravo!”
'Spoiled your life'
According to Lad Bible, Rimmer apologized live on air, stating: "Earlier on in the previous cooking item I may have informed guests that the dhal was in fact vegan.
"There was of course ghee used in the recipe, which isn't vegan. I allowed Jon Richardson, who is indeed a vegan, to eat some of it.
"On behalf of myself and the Sunday Brunch team, I would like to sincerely apologize and hope I haven't offended you and spoiled your life."
Richardson replied: "When I'm sick during my interview, you can take responsibility for that. But it was delicious. And it could be vegan..."