I've never had Thai taste but Nava and Ruan both have excellent food. There are lots of vegetarian options at Nava

We regularly eat at both Ruan Thai and Thai Taste, and there are tons of options with tofu (or without any protein, meat or otherwise). I'm guessing Nava Thai is the same.

I've seen a few Thai restaurants in Wheaton recommended on this board - Ruan Thai, Nava Thai, Thai Taste. Which one is the most vegetarian friendly? Thanks!