Did I miss something?
Have you benn contracted to write this cookbook and are just now doing your research?
Why are you writing a cookbook about a subject you are not familiar with?
If you ever hope to get an agent to work out an agreement with a publisher, you must submit a query that represents your idea, your qualifications, a sample chapter, table of contents and sample recipes.
Most cookbooks are written by people who have specific interest and experience in their subject matter. Also, most often cookbooks are used as a promotional and marketing tool for the author's overall culinary career. Do not invest a lot of time, money and effort into writing a cookbook with the expectation of making any money from it. Just look at how quickly the latest release shows up discounted on the shelves of T J Maxx and Sam's Club- even the ones of well known chefs and food celebrities.
There are some wonderful books out there about how to manage a career of writing about food.
Check out Will Write For Food.