On the N340 just south of Tarragona at Cambrils used to be the Gran Buffet Restaurant where for a cheap price you could eat as much as you like.Best place in spain that I recall but does anyone know if it is still there?It has now been bypassed by the AP7 and toll free A7.There was another with the same name just north of Tarragona at Altafulla.Restaurants on the N340(off motorway)are numerous.In fact this is true pretty well all over Spain.Travellers are well catered for 24hrs a day.