It is important to make sure that your resume is updated whenever you are on the quest for new employment. It probably hasn't been updated since the last time you were looking for work and you have so much more experience now. Make sure to include any experience that would enhance your ability to be valuable in the food service industry.
A good place to begin your food service job search is with a job recruiter or employment agency. They will want to discuss your experience and job goals. Be clear with them about your job goals. For example are you more interested in food server jobs, food sample jobs, or food management jobs? The food service industry is very large and broad. Some employment agencies and recruiters charge for their services and some do not. Some of them what you to work with them exclusively and some do not care if you are working with other agencies. Make sure you have a clear understanding of all of their policies before making any agreements.
Another good place to look for food service jobs is on the Internet. Again, be specific with your search. If you are interested in restaurant management jobs or food catering jobs search specifically for those. Online job boards are updated extremely often so make sure you check them on a very regular basis so you don't miss any employment opportunities.
Different cities and states have different rules regarding what people must do before they are able to work in food service jobs. In some places people must take a class and pass an examination to obtain a food handlers card. Research the regulations regarding food service jobs in your area.
The food service industry is vast with many different opportunities for you. Good luck on your search for a job in food service.