I really tire of seeing all those cooking isekai, when the other chefs are always completely incompetent to the point of not even recognizing "burnt" and "raw in the middle". How the hell is it possible for someone to work as the royal head chef, to not cook better than a simple villager who legitimetaly has a reason not to have learnt better.
I'd be okay if their weakness was old recipes, or just oily stuff since that used to be what cooking was like. But seriously, I'm pretty sure even the roman knew how to cook meat without wasting it like that.