From Manga Updates:
So here's another Protagonist comes to another world series by Alphapolis.
Kurokawa Lisa is an ordinary office worker, who has practiced lots of cooking while living alone. One day, she wakes up in another world, with a concerned little spirit hovering over her! She has apparently been transported to a magical, spirit-filled realm by the will of the goddess, and there is no known way for her to go back. She is taken in by a wealthy couple, and they and her new spirit helper treat her with nothing but kindness. There is one problem, however--the food in this magical world is gross! Lisa insists on helping the household cooking staff prepare a traditional meal from her world, and it is a big hit with her hosts. Soon Lisa knows what she should do in this new world; she should open a cafe and treat everyone to delicious food!
The heroine, Lisa finds herself in fantasy world. Despite the kindness of her caretakers and friends, their food sucks! So Lisa teaches them how to make food from her world and opens up a cafe. And she also gets a handsome soldier to work for her as a waiter at her cafe.