Opera Tavern is a classy little spot in Covent Garden that does very good Spanish tapas, and is perfect for a range of occasions, from dinner with the parents, to grabbing a snack before seeing a show at the theatre. In particular, the vegetable and meat cookery is very good. The famous Iberico slider is, for the most part, overrated, but you should definitely order any of the standard staples as well as a dish of prawns.