@piggo Nice. So you fold it up instead of the more traditional "roll".
Anyway, for a more "juicy" result, you could consider putting under the filling a thin layer of melted butter mixed with breadcrumbs. That layer would soak in and keep all the juices released from the fresh fruit filling.
@piggo What I also see, is yet another small disaster in making. Even if you vent this one properly, it will probably burst because of the juices flowing off from the grated apples.
Let us know the result 🙂 .