Not every ingénue is deserving of the attention Zoey Deutch is about to get. But this 23 year old already has the miraculous and mysterious skill of a veteran actor. Since her brilliantly nuanced performance in “Flower,” I have wanted to find out the secret to her magic. And now she has delivered a rom-com-pantheon-worthy performance in “Set It Up.” We talk about “process and not outcome," being “right for a part and not just liking it,” and the “miracle” (my word) of The Pizza Scene.