Taishuu Shokudou Akuyaku Reijou: Konyaku Haki Sareta no de Shokudou wo Hiraitara Iyashi no Ryoku ga Kaika Shimashita

Born into a family of priests, Lydia was shunned as an "unwanted child" due to her lack of magical power. After having her engagement annulled, she decides to leave home and start a new life by opening Lobelia, a humble eatery! Haunted by the trauma of her painful past, she pours all her resentment into her cooking. Yet, for some reason, Lydia’s dishes become incredibly popular as "healing meals" loved by everyone!?

Source: MU