Really?
How about a quick rundown on how you would go about filing a lawsuit against McDonald's without hiring an attorney? Bear in mind that McDonald's legal department has an annual budget running in eight figures.
So, do you think your self help legal program has a snowball's chance in Hades, or are you just too lazy to make that work out?
A quick Google search will yield countless results: http://www.wikihow.com/File-a-Lawsuit
Also, once the health department conducts their investigation, there will be even more evidence to help your case in court.