Chris, this is a sensitive issue, and it has been discussed quite a bit. You might try a search here on catering, but will probably get tons of threads.
The short and sweet of it is:
1. Will your insurance cover you and all involved if someone becomes ill from your product?
2. Are you willing to lose everything you have in a lawsuit in order to make a few bucks?
There are many other issues, too many to list. Look around, see what comes up.