Hi, I moved this thread to Digital Imaging. Unfortunately, when an area is blown out there is no information in it (by definition) so I don't think there is a good fix for it. Occasionally with a small area, the clone tool in Photoshop can help but I don't see that as an option here. Sometimes a little blowout makes things look more natural IMO.

In this case, having a diffuser would have lowered the contrast on her and would have avoided this problem. There are other ways to control contrast like moving into the shade but all of the best options I can see in this case would have happened at the time of capture.

Here's the reflector/diffuser that I have - it's a diffuser with a four-sided reflector cover, giving you five tools in one.