R:"Creator, why have I been created?"
MC: "....Rosaline, you were an accident."
R:"... that does it. I'm taking over."
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It is an interesting concept thought. Not something you see often in manga, manhwa or in general.
@svipi: They aren't "westerners". They're "completely different fantasy civilization that slightly resembles old western world".
The trope is not about superiority but about civilization having bad or weird cooking habits and someone coming up with new recipes.
@DaDingo:
Well, here's first introduction of the "retainer"
https://mangadex.org/chapter/1217892/9
I believe the author ignores previous portrayal of the character for the sake of... I don't know? Making MC look clever? Doesn't seem to be very convincing...