Green Zebra is a lovely space with top notch food. My partner and I went for Valentine's Day and chose all vegan items (we chose maybe 6 items). Each item was fantastic. The staff were very attentive and very professional. All in all, we were very pleased with the experience.
Also, it seems that they are becoming increasingly more vegan friendly. For example, I remember checking them out for Restaurant Week a few years ago and they only had vegetarian offerings for their prix-fixe menu. This year, however, they had both vegetarian and vegan options for their prix-fixe menu! Nice!