This is a tough one because food is not really an invention. Most "formulas" are kept secret, so a patent is not applied for. Recipes can be copyrighted, but that can be done as simply as adding the circle c to your instructions. So, if I understand your question, to sell it is as simple as getting a business license and hitting the streets. If it goes well and you would like to build more then a boutique business, then ultimately you could sell the company and cash out. In the mean time, tail-gate parties, getting the word out and maybe even selling direct to restaurants would be a good start.
Hope that helps!
Lisa Lloyd
www.LloydMarketingGroup.com