Seijo ja Nakatta node, Oukyuu de Nonbiri Gohan wo Tsukuru Koto ni Shimashita

Rina, who came to another world by summoning a saint is surprised at the unpleasant taste of rice. Even the royal palace has this taste...? "I will make it myself, so lend me a kitchen!" Freed from the role of a saint, Rina grabs the hearts and stomachs of the royal family with delicious food!

(Source: Kadokawa, translated)