This looks incredible! I've been seeing some recipes for savory Dutch Babies lately, but your caramelized onion and goat cheese combination sounds amazing. I might just have to try making one of these in the near future.
There's an Adam Ragusea version that I watched a while ago that initially sparked my interest is savory Dutch Babies; his is a classic bacon, egg, and cheese.
A Cacio e pepe version also sounds really good or a pancetta and gruyere one.