Gordon Ramsay and Piers Morgan are beefing over beef.

The Kitchen Nightmares star, 52, has long been an outspoken critic of veganism – but after a recent change of heart, Morgan took issue.

“Oh [for f— sake], Ramsay… not you as well? This looks utterly revolting,” Morgan wrote on Twitter March 10 in response to news that Bread Street Kitchen, Ramsay’s London restaurant, would be serving a vegan roast dinner.

Ramsay didn’t take Morgan’s dig lightly during a Tuesday appearance on The Late Late Show with James Corden.

“So Piers Morgan is now a food critic,” he said. “Go and f- yourself. Seriously, really? Seriously?”

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The celebrity chef’s tell-off received a massive cheer from the audience as he explained his decision to incorporate vegan options into his famously meat-heavy menu.

“Here’s the thing, we have three girls. Moving trends. I mean, veganism is on the rise, so ought to adapt,” he said. “Yeah, so just have to eat a slice of humble pie.”

Morgan, 53, refused to concede, however, responding on Twitter to an article about Ramsay’s Late Show diss with, “Ramsay’s shamed face says it all.. he knows I’m right.”

The chef has come a long way since Paul McCartney, a longtime vegetarian and activist, caught wind of comments he made regarding his food choices.

FOX via Getty; Kirsty O’Connor/PA Images via Getty

According to the Telegraph, Ramsay said in 2008, “If one of my daughters’ boyfriends turns out to be a vegetarian, I swear to God I’d never forgive them.”

The former Beatle, meanwhile, said the comments were a case of “live and let live.”

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“Even that I would forgive because it’s not my affair, it’s not up to me if he talks stupid or not,” McCartney said. “I’d be happier if everyone was vegetarian. The planet would be better off for it. If you do see Gordon… tell him he’s a lovely boy.”

Ramsay made headlines on the subject again in 2016 after he responded to a tweet asking if he was allergic to anything with, “Vegans.”