Dress it Down:
For a simple cream cheese layer (less cheesecakey), eliminate the egg.
You can also eliminate the cream cheese layer completely.
Easily 1/2 this recipe for an 8x8 pan
Change it Up:
Add a touch of cinnamon to the peach filling.
Try different fruits such as blueberry, blackberry, raspberry, or a combination (like peach-blueberry, peach-raspberry, mixed berry). You may need to adjust the cornstarch depending on the juiciness of your fruit.