In the final food truck scene, Shawn throws a white oven mitt at Gus to wake him up after he faints. The oven mitt bounces off of Gus and lands on the floor of the truck, but in the next scene, it is no longer there.
It's unlikely the boys would have been cited for unauthorized food source since they were serving fried 'mash-up' common foods that could be purchased from any grocery store.