Imagine you were given the task of taking a concession stand on the road and spend your summer touring around country fairs and open air events. What kind of concession stand would you have?

I would like ideas on something different. I'm not interested in anything that you can currently find at such events, like hot dog stands. Most of those are related to junk food. I'm interested in more healthy choices. What could travel well and be easily set up?

Any ideas would be appreciated. Thanks!