The Best Hazelnut Cream Cake

July Fourth was the ONE day of the year that my dad, a man who never spent money frivolously, took us to the drive in to see a movie. (This was a man who had to be begged, repeatedly and loudly, to stop at Twin Kiss, the local ice cream place in the summer. Begging didn’t always work. He’d say, “Oh, we have better stuff than that at…