You know what's great?  Food trucks.  They don't just sell greasy diner food anymore.  A lot of them sell gourmet food these days.
Sorry, what is a food truck? Does it deliver food to your home?
No, a food truck is a large truck or trailer with a big window on it where they sell food.  The kitchen is entirely on board.  You see them selling hot dogs at baseball games and stuff.
Is it a popular form of food? Do they cook for you or are the food precooked? 
They mostly prepare and cook from scratch these days.  Some of them are truly like little restaurants on wheels, and some are getting highly rated even from restaurant critics.
Wow, must be really good food then. Are they a franchise or privately owned?
Some food trucks are starting to franchise, but most of them these days are simply driven chefs who can't find a job cooking gourmet cuisine in an established restaurant.
Do you think they are profitable? Can they make a good living out of it?