I found the recipe to this Walter Mitty Clementine Cake on a blog by Cathy Merenda. In her post she talks about how one of the through-lines in the film (Walter Mitty) is this cake. At the beginning of the story, Walter’s sister Odessa delivers him one on his birthday. It's his favorite cake made by his mother (the wonderful Shirley McLane).
I really like this cake because it is gluten free! It is flourless and has whole clementines in it. I also found it super easy to make!
You can also visit her blog to get her story on the cake. Click here.