We have the exact same award in our troop, usually for car camping. Patrol with the best overall food. We look at teamwork, cleanliness (ug!), and if they are somewhat using different food groups. We have adult 'judges' that go around and watch and test each patrol during the outing. At the end of the outing, usually during a Scout's own, we have the judges announce the patrol who has won. The SM even went and purchased a good sized plastic spoon and spray painted it Gold. We present this to the patrol and they can attach it to their flag until the next outing. They love it and to their credit, some of them have come up with some good menus (shis-ka-bobs, buffalo burgers, etc)We had one patrol who made strawberries and chocolate for dessert, which sounds great, but was pretty bad given the chocolate was overcooked. This wasn't even on their menu they just gave it a try. They got points for the trying part for sure.
As far as patrol boxes, my suggestion would be just think basic!