Looks like there's a new version starting.
https://mangadex.org/title/a9a309ea-7711-4c3d-af13-2bfa54cd31be/3000-nen-fuuinsareshi-jaryuu-chan-to-tomodachi-ni-narimashita
Spider Wife~
Spider Wife~
Here she comes with a big damn knife~
That's not a knife?~
That's her arm~
Mess with her man and you'll come to harm~
Watch out~
Here comes the Spider Wife~
My guess is that you are correct. It will be a Japanese dish she hasn't introduced. Something only someone else from Japan could have made. So another reincarnator or summoned hero.