How do you start a petition about changing school food?

i kinda need to do this. the school food is rediculous. it is unhealthy and filled with fat and sugar and all i want to do is eat healthy! is that too much to ask for?!! but how do i do it?How do you start a petition about changing school food?your class president or vp should know what to do... discuss the problem with them and see if they are willing to join you on this... if they are you are most likely to gain the support of most of your class and the administraters might be more likely to comply with your complaints if you have class president behind you, try to get all the class presidents from all the grades. good luck! if it doesnt work just pack a lunch