Zucchini is a small vegetarian restaurant in the centre of Helsinki.
Its address is Fabianinkatu 4, 00130 Helsinki, and its phone number is (09) 622 2907. Oddly, or at least interestingly, it does not seem to have a web site, although a Google search brings up a lot of reviews from different tourism sites.
It is about five minutes walk from Kaisaniemi metro station.
Stefan introduced me to Zucchini in November 2012, as a meeting place where we could also have lunch.
The room is perhaps just too small and crowded to be a comfortable meeting place, but as a place to have lunch it is truly excellent. In fact, I would say that the lunch is so excellent as to make it worth risking a slightly cramped meeting.