Hi Patryk, I hope this isn't too late:
Some squats and former squats in Amsterdam have community kitchens on certain days, you can find them here:
There are a lot of Asian restaurants on the Zeedijk, near Central station, which have vegetarian and vegan options.
Restaurant the Golden Temple, on the Utrechtsestraat 126, is an odd mix of Indian Thali, Middle Eastern mezze, pizza and some random other things like burritos :) The offer a *lot* of vegan options (including amazing desserts), and know exactly what vegans do and don't eat. If you go there with another person, you can order all of the Thali dishes and share them (only the raita doesn't have a vegan version if I remember correctly, but check with them) or all of the mezze, most of which I think are also available in vegan versions, for €16.25 each: http://www.restaurantgoldentemple.com/index.php?option=com_content&view=article&id=77&Itemid=58
Oh, and the Molli isn't on Radar, it seems, but they also have dinner on some nights: https://www.facebook.com/pages/Molli-Chaoot/138852549489338
(their posts are mostly in Dutch, but the bing translation is good enough to follow, I think)
WOW! thank you all a lot, i'm leaving tonight, so i'll be there tomorrow :) you give me hope for good food :)
thank yo ua lot, i'll check it!!!