In the evenings this "regular" veg-friendly restaurant mutates into one of the best vegetarian restaurants I found in the Netherlands.
I discovered "Natuurlijk Nul-15" ("natuurlijk" means "natural" and "nul" -zero- 15 is the area code of Delft) on one of the large deal-of-the-day websites. I bought an inexpensive voucher for 3-course vegetarian or vegan menus for four persons.
We went there with the four of us - three vegans and one vegetarian. All of us were surprised by the quality and tastiness of our meals, including starters and desserts. More than 50% of the menu was vegan. The staff was friendly and helpful and the general atmosphere was just very nice.
While the place has regular opening times during the day and people can just walk in, reservations are required for the evenings. However, it was quite easy to make a reservation. The vegetarian/vegan dinners seem to be very popular also among non-vegetarians. I did not see one empty table during the evening we've spent there.
I've seen this restaurant a few times on a deal-of-the-day website, it might be worth to watch out for this. But even without discount the food is absolutely worth its price (3 courses EUR 27.50).
5 cows for the evenings! And of course I hope that some day this concept will be extended to the rest of the days.Pros: wonderful food, good value, great choice for vegans
Cons: serves meat during the day