Preheat oven to 375°F and spray an 8″ x 8″ x 2″ glass or ceramic dish with nonstick spray (I used a 7″ x 9″ x 2″ ceramic dish).
In a bowl, mix apple cubes, sugar, cornstarch, cinnamon, and nutmeg to coat evenly.
Cut the cinnamon rolls into 1/2-inch strips and roll them out on a floured work surface until fluffy. Sprinkle it with flour, as it is very sticky and will fall apart when rolled. You can dust your hands with flour and tap it to loosen it up if you find it easier.
Arrange the first layer of flattened cinnamon rolls on the bottom and sides of the dish. Press them with your hands to seal them well.
