like the previous reviewer wrote, you can easily find this Food stall when you leave the Shopping mall Emporium by the back door. You'll recognize the vegetarian Food stall by ist many yellow flags with red characters on it.
the Lady could speak enough English to explain me that I can get Rice and then it's 30 Baht per "topping" i choose. there were like 12 different things to choose from, some with mock meat, a few just veggies. i got 2 toppings but just smaller portions and paid 30 Baht.
I Chose a coconut Curry with mock meat and some green veggie with Tofu. i wanted to choose sth else originally but i spotted a black hair in there. :(
there are plastic tables with chairs for you to sit. the Portion might be on the smaller side for some People. the topping were quite spicy for me. taste was okay but nothing extraordinary in my opinion.
i talked to a local and an expat and they said this is the best vegetarian place to eat in all of Bangkok.
if i'm not mistaken there are 2 veggie stalls next to each other, at least they both have the same flags. i went to the one that's closer to the entrance of Emporium. served Thai Food.
Update: went there again today. feel like i got a bigger Portion this time. was tasty!
Updated from previous review on Friday January 22, 2016
Cons: spotted a hair in one topping, a little hidden, portion not big