Carpaccio Cipriani

1 egg yolk
juice of 1 lemon or 1 tblsp white wine
vinager1/2 tablesppon dry mustard
a few drops of tabasco sause
1 cup (250ml) olive oil
salt and freshly ground peper
3 tblsp meat stock
800 gr beef sirloin of a good red color
Place the egg yolk in a blender with a quarter of the oil. Turn de blender on and add the rest of the oil in a slow thin stream. Flavor with lemon juice and salt and pepper. Disolve the dry mustard in the stock and mix it into the mayonnaise along with a few drops of tabasco. Using an electric slicer, cut the beef into paperthin slices. arrange the the slices to cover each plate. in a thin stream, pour the mayonnaisse over the beef in spirals beginning at the centre.