Henkyou Kishidan no Oryourigakari!: Suterare Youjo desu ga, Kahogo na Kazoku ni Hirowarete Oishii Gohan wo TsukurimasuNewBorder Knight Order's Cook!; Henkyou Kishidan No Oryourigakari!; Henkyou Kishidan no Oryourigakari!: Suterare Youjo Desu ga, Kahogo na Kazoku ni Hirowarete Oishii Gohan o Tsukurimasu; 辺境騎士団のお料理係！; 辺境騎士団のお料理係！～捨てられ幼女ですが、過保護な家族に拾われて美味しいごはんを作ります～

After being abandoned by her biological father, El suddenly remembers her past life. She is taken in by a frontier count’s family and comes to live alongside the frontier knight order. There’s Lars, a master swordsman; Merlino, a healing mage; and Halon, who strives to catch up to and surpass his older brothers. The three brothers are overjoyed to have a new little sister—and dote on her endlessly. However… the food in the frontier region is terribly bad. So begins the reincarnated little girl’s culinary reform! https://www.cmoa.jp/title/346100/