It was a very light potato foam with a clean taste of milk (not cream), almost malty. I liked it a lot and thought it was the best thing about the beef dish.

For those interested, here's another photo set of a haute cuisine meal in Switzerland, this time, Philippe Rochat at the Hotel de Ville in Crissiers (Three star):

http://www.flickr.com/photos/ulterio...7625876380105/

I didn't attend this meal.