According to the description you provided, it is difficult to determine the exact name of this novel. There are many rebirth novels that involve the story that the protagonist was a chef in his last life and was recognized by fans through live cooking or participating in programs in this life.

You can try to search by some keywords, such as "rebirth", "chef", "live broadcast" and "program", and you may find a novel that matches your description. Besides, you can also consult some friends who like reading novels, and they may give you some helpful suggestions.

I hope these suggestions will help you.