Tensei Shitara Suterareta ga, Hirowarete Tanoshiku Ikiteimasu

Milly was reincarnated as a baby with memories of her past life—but just five months in, she's abandoned out in the cold...! She narrowly survives after being taken in by a couple named Joe and Marissa, but life among commoners in this other world turns out to be pretty rough... A filthy room covered in dust and stains, and none of the delicious food she had in her previous life! On top of that, the restaurant-inn the couple runs—the "Shaded Cat Inn"—is struggling to stay afloat!? Determined to repay the kindness of those who saved her, Milly sets out to turn the place around using cheat magic and the knowledge she carried over from her past life—.

(Source: Alpha Manga)