Cuando fue (setiembre de 2010) no me hablan de restaurante, solamiente del buffet.
At those times I don't heard about any restaurant with a la carte menu. There was only a buffet (it should have been opened as I was flying to EZE, last flight of the day).
Since one year I don't fly anymore with IB due to some prices changes (thanks BA) (IB used to be the cheaper for me, now I can fly direct flys or quite (TGV first from home) for nearly the same cost).