While I can't comment on the viability of your cookbook or going about researching it, I do have a recommendation on the publishing end. There are so many ways to publish your book for free or very low cost outside of the traditional book publishing business. I would recommend you look at something like Apples iBook, it's a very user friendly platform for publishing ebooks and allows you to submit items to their book store for a very nominal fee (I think it's $100 to $150 to add it to the online bookstore). Also, as Pam R mentions amazon has great self-publishing tools as well.