At Kometen you can eat every monday vegan food, except for the first monday of the month. Then it is vegetarian. The building is an old factory in the centrum in Maastricht and it has a good atmosphere. The people who come there are very nice and artistic. For 5 euro's you have a whole meal. Drinks not included. It is very nice to do this sometime. You should go in the summer, because in the Winter it is very cold there.
Cons: Cold in winter