Presumably the "surprise me" would mean a random selection of the offerings rather than something not on the visible list? Americans are very fussy with their food so not knowing what it is until it arrives at your door may be going too far. But from a UX perspective I think that is shirking your responsibility to make the meals interesting.
You can certainly gamify things, and also take inspiration from the humour of Woot. For example bingo cards where you try to have meals covering the whole alphabet, or colours. Or "World Tours" where there are sequences of recipes that trace a path geographically around the world. Or voting certain ingredients off the "island". Or pick a film/TV show and make what the characters eat (or inspired by what they eat, or their locations). The Once Upon A Time In Mexico DVD has a 10 minute short on it showing how to make puerco pebil that I've done several times.
You can certainly gamify things, and also take inspiration from the humour of Woot. For example bingo cards where you try to have meals covering the whole alphabet, or colours. Or "World Tours" where there are sequences of recipes that trace a path geographically around the world. Or voting certain ingredients off the "island". Or pick a film/TV show and make what the characters eat (or inspired by what they eat, or their locations). The Once Upon A Time In Mexico DVD has a 10 minute short on it showing how to make puerco pebil that I've done several times.
Here for example are the Indiana Jones locations: http://indianajones.wikia.com/wiki/Travel_with_Indy:_Locatio...
Out of that you'd get South America, France, Egypt, UK, India, Spain, Venice, Jordan and the US Southwest. My mouth is already watering :-)