I have been to a tapas bar in spain and most of the dishes had a lot of olive oil in them so you need to chosse carefully I had some olives in brine not too bad for points and they did have some salads to choose from which I had without dressing. I think you will just have to look at the offerings and ask the friendly waiter what is in them. Although I am not now a veggie -used to be- there were a lot of meat free offerings on the tapas. Good luck