Bake oven the apples. To do this wash them carefully, put in a dish suitable for oven, with half a glass of water, and cook at 180 º for 25 minutes
Prepare the filling. Mix custard with raisins and nuts hydrated.
Prepare the pastry prison. Make a bunch of baking paper slightly larger than the apple. We use a grid cutter or sharp knife, to create a grid on the pastry sheet.
Bake 15 minutes at 200 º. If dough is too thin to use the cutter and gives you problems, you can knead and stretch the width you wish.
While baking, prepare the caramel, just putting sugar in a nonstick pan over medium heat, until it becomes liquid and get dark.
Once baked the pastry grid, cover with hot caramel, being careful not to get burned. Let it dry, and the dish is ready!