1. Preheat the oven to 180C/350?F.2. Cut each brick sheet in half. Fold the round edge over the straight edge to form a rectangle.3. In a bowl, mix the dates and white chocolate. Place a little of the mixture on one end; fold several times, from one edge to the other, until the other end, keeping a triangular shape. Brush with melted butter.4. Place on a baking sheet lined with parchment paper.5. Bake for 8 minutes.6. Remove from the oven and serve.