The area around Jenny's is full of restaurants serving passable and affordable Thai food, but I found that Jenny's was just about the best vegetarian one out there. They've got their own separate veg menu with quite a few choices, and everything that my friends and I tried was good. I particularly recommend the pumpkin and veg stir fry. Brown rice is also available. Everything is priced about the same or slightly cheaper than dishes at the other tourist-friendly shops in the area.
Cons: Standard tourist fare