Why am I, a cook, always involved in cases?

In the center of the continent, there is a big country, and countless secrets are hidden deep in the palace. In this magnificent palace, there is a girl named Lin Zhiruo. She was once a little cook in the original world. After traveling through time, she had to leave her hometown and live in the harem. She knew her limits and waited silently for the day to leave the palace. However, fate did not seem to intend to let her spend this time peacefully. The princes in the palace all died young, and those who survived were also seriously ill. And the food here seems to have some kind of intervention. It can not only eat the dead but also cure diseases and save lives? As she investigated step by step, she found out...