IMO you are missing the point. The point here is their intention to insult and retain deniability because someone (you in this case) will point out the iffy authenticity of the fare.
It’s like saying “eff you” and then smugly claiming you didn’t say f*ck you.
I just had a dinner of fresh pork cooked over low heat then served with Kokuho Rose rice mixed with carrots. A lot like okayu ~ or, rice with vegetables.
Not that I am being flippant, but I don't see the insult.