I once heard that the heir to an amaretti factory fortune was kidnapped for ransom. In my imagination I pictured him leaving a trail of amaretti crumbs in the forest to lead the authorities to his rescue. I can't guarantee that this strategy will work if you're kidnapped, but if you leave a trail of crumbs that leads to this crisp, you can be certain a crisp search-and-rescue party will follow.
Note:
The amaretti topping can be made ahead and refrigerated in a sealed plastic bag for up to 1 week, or frozen for up to 6 months. I like to keep a batch on hand, frozen and ready for a last-minute dessert.