I only had lunch in Escorial, in a central esplanade with the name of "El Doblon d'Oro".
It was a good lunch, with a marvelous roast beef at a regular price.
Crises has passed since my visit, and the restaurant changed hands, and it is now called Taberna del Corcho.
Serving with the same quality?
Well, that's something that I will check in my next visit to town.