This is only very tangentially a tart. Icebox cake has a "crust" in the form of cookies and a "filling" in the form of whipped cream and fruit, so I'm calling it my tart of the month so I don't have to turn on the oven!
Icebox cake is actually really easy to make. A magic process takes place when you layer cookies with whipped cream. They take on a cake-like consistency as they moisten and become almost like solid cake when sliced.