Publishing a Cookbook. Anyone have advise on how to start if you know you want to write a cookbook? How to find an agent? Etc.

Here's an article to get you started: https://www.davidlebovitz.com/writing-your-ow/
More on finding an agent: https://www.janefriedman.com/find-literary-agent/
Check out Publishers Marketplace and see who represents cookbooks: https://www.publishersmarketplace.com/pm/search?ss_q=literary+agent+cookbook&ss_c=
Make sure you read a book and follow the guidelines on how to query an agent. You only get one chance per book. Good luck!!