Toan V.
Google
One of the best vegetarian/vegan restaurants at city center. The dishes are creative, yet so soooooo delicious and rich. My recommendations would be the moussaka, quesadilla and pizzas.
Another plus is if you are long for a taste of Vietnamese dishes, you can enjoy the atmosphere at Prem while ordering the vegetarian dishes from Pi vegetarian restaurant right at the lower floor since they belong to one owner and building.