Senya Senshoku Monogatari: Haikoku no Hime desu ga Koori no Ouji Denka ga Doumo Dekiai Shite Kureteimasu

Because her mother was a slave, Erendira was oppressed despite being a member of royalty. She was brutally bullied by her half-brothers and sisters, eventually losing her life. However, at the moment of death, memories of her previous life as a Japanese person came back to her! Erendira sought revenge. However, her fate changed when the neighboring country of Agdnigur invaded. What awaited her as she tried to survive using her knowledge of "cooking" from her previous life... A Cinderella story of reincarnation into another world, where she is loved from all sides!

(Source: Pixiv Comic, translated)