Very simple straight forward skiing, flex the outside leg once the ski comes around the arc. Let go, relax, tip the other way, but let the momentum take you across.
If you try to shorten the radius or quicken the arc from what I'm skiing, (In this video) the edge will break away. The only way to shorten the turn or tighten the radius from here is to flex faster, pull back harder and tip earlier. Steering is out of the question!