Put the butter in a small bowl and
season with pepper. Finely chop the
olives, capers and thyme leaves and stir
into the butter. Chill until ready to use.
Heat a griddle pan or barbecue until
smoking. Brush the steak with a little of
the oil and lay on. Cook for 3-4 mins each
side, then transfer to a board and cover
with foil to rest.
Cut the ciabatta loaf in half, brush
the cut side with remaining oil and place
cut-side down on the griddle pan for
1-2 mins, until charred. Place the steak
on the bottom half of the loaf and spoon
the butter over it. Add the lettuce leaves
and sit the top of the loaf on.