Tensei Ryouri Kenkyuuka wa Kyou mo My Pace ni Ryouri wo Tsukuru: Anata ni Kyoumi wa Gozaimasen

The moment her engagement was broken off, Countess Shirley Lila Fontaine's memories of her past life returned to her. After being dumped by her fiancé for being overweight, who said "I have no intention of marrying a pig," Shirley is reborn as a beautiful young woman, making full use of the knowledge from her past life as a beautiful culinary researcher. From that point on, her fate begins to change drastically, and she ends up serving the castle as a maid to the first princess, Adele, but...!? (Source: Takeshobo, translated)