Cutting vegetables is time consuming and labor intensive. Sure, in other places, you can use low cost labor for that. But in Switzerland, that person has to have a living wage, and that price includes contributions to their pension fund.
But between you and me, it is not likely to be better than what you have there.
I love the Saigon. My reservation about the Oerlikon-Glattpark location place is the place. Hightech suburbia. I have may lodgings in that Glattbrugg-Oerlikon area and in a way li9ke it. But my soul is far more conservative. So that I love he Wiedikon area .... While the LA, mentioned by Taratonga may be a good idea
Thumb up for Saigon. Went there yesterday. Food was excellent and huge portions. They could have filled the wine glasses a little more though. But very nice people. Highly recommended!
This one is also my go-to place for pho. The rest of their food is good too, but I usually always go there when I have a craving for pho soup. Right across from the Binz train station.
I often was in Vietnamese restaurants in Morocco and in France. Two of them I have in particular memory. The one in Rabat was the only place where you had not to defend your glass against 20 flies, and where you did not have to defend your meal against 50 of the beasts. The other one was in St. Malo, where the chief told me how the chaps in Rabat did the trick, and who had his restaurants in a very beautiful location