I've been to Bio e Te some times now.
It relaxes me to go to the place.
For around 25 euros you can get a full 4 courses menu, totally vegan and organic, enjoy the warm atmosphere, drink tea and enjoy lovely desserts.
And if you've already eaten too much, they are perfectly ready to give you a doggy bag with your dessert in order not to have you losing the chance of tasting it.
I advice it!
Cons: Not that convenient by public transport