I agree with the previous reviewer. Going with my wife and a friend at 11:30 on a Saturday, I was disappointed to find that my only options from either the breakfast OR lunch menu were soup and salad. And the salad wouldn't be available for another 30 minutes.
The soup turned out to be pretty bland potiron soup which I do better at home with no effort, so not a treat to pay for that out!
The latte was OK but nothing spectacular.
I will check in again in a couple of months; if there are no more vegan options, I will unrecommend this place strongly to my large network of friends, including a Paris Vegan meetup group.
Cons: almost no vegan stuff, small and hard to get a seat