Balti Drambliai is probably the most known vegetarians place in town, and one of the oldest. It has been known for attracting creative folks, new age hippies, and just people who wanted to meditate at their veg meal under the vibes of relaxing music.
The food is not bad, but not extraordinary. I have been there many times, and I think they did better in their early years, but now they lost some kind of quality and genuine feeling of the preparation of their meals.
Vegan options marked separately, but check for honey, last time I was there it was included in one or two vegan options.
I also think they the portions are too small, and too pricy for their size.
Cons: small portions, more flavours needed, slow staff