Is the trend starting in Switzerland? Are there any food trucks with good quality food in Zurich city around lunch time?

I know there's the grilled chicken truck, of course. But other different types of food, like in the US ?

Thanks

I looked into this also.

I dont believe it will happen soon here in CH. to many laws etc etc. when I inquired about it they said they didnt want their city to llok like gypsies invaded it