First, it has to taste good. Third, it can't cost a fortune. And most importantly, it has to be fairly easy to cook in a large quantity. Hamburgers and Hot Dogs OK, so this is a no brainer. Barbecues or campfires, hamburgers and hot dogs are the best choice for dinners.
Hot dogs are nice.
You just shove 'em on a stick and roast 'em on a fire. With hamburgers you just put 'em on a grill. Then you take a bun and fixins', and tada. Corn on the cob Everyone loves corn on the cob, even Uncle Joe and his dentures. Just get a huge pot, fill it with water, and drop a bunch of corn in.