Heading for Winterthur we fairly randomly selected this place,
http://www.friedenundfisch.ch/
I thought it well worth giving a recommendation to, 4 of us sitting round the table mmmmming away like a barber shop quartet who don't know the words. Good service too and the owner came by to apologize that he had been busy in the kitchen and hadn't got out sooner to have a chat and tell us all about the ingredients.
Talking about good restaurants in Winterthur: There is a great indian place called Tandoor in Winterthur.
http://www.restaurant-tandoor.ch/
When I was living in Winterthur I sat there almost every friday night, ending up singing songs with the indian / nepalesen crew until the early morning.