If time machines existed, the first thing Baili Dong would do is buy her System a hearing aid.
Then it wouldn't mistake Food Wars! for a spirit of the index finger :)
As a newly minted hero, Baili Dong took her built-in Artificially Stupid System's advice and decided to max out her cooking skills in the Little Chef dungeon, dominate Totsuki Academy, and then defeat the Demon King.
But then she transmigrated to Heian-kyo. While reciting recipes, Baili Dong fell straight into the cursed king's lair. That's when she learned that the Demon King she had to defeat was Ryomen Sukuna, not Cold Noodles with Crispy Rice.
Damn it, puns like that should cost you money!
Fearless in her ignorance, she took the System's encouragement and brazenly challenged Ryomen Sukuna to a cooking duel.
"Hmph, little insect. Let me see what you can do," said Ryomen Sukuna, seated atop a mountain of bones.
"Domain Expansion: Malevolent Kitchen!"
Baili Dong: The cooking championship in Heian-kyo requires contestants to have superpowers too???
Luckily, she'd prepared a golden finger for just this occasion, so Baili Dong wasn't worried at all.
All she had to do was shout, "Food Wars!" and the power of righteousness would force her opponent into a cooking duel, then randomly select three lucky souls to serve as judges.
If Baili Dong won, she'd gain special protection that made her immune to her Food Wars opponent's attacks.
And so Ryomen Sukuna, who'd planned to slaughter her, was forced to put on an apron and slice raw fish with murderous precision at a suddenly appearing cutting table.
Judged by Uraume, who'd also been forced to work, and two random cursed spirits, Ryomen Sukuna lost, as expected (in a flat, emotionless voice).
Winner Baili Dong: Yay!
Loser Ryomen Sukuna: I'll endure this!
Theme: Fall in love