Defrost the puff pastry. Wash the raisins, dab dry. Wash apples, cut them into small pieces and immediately
sprinkle lemon juice
Halve each dough sheet and roll out to a rectangle (approx. 10 x 12 cm) on a little flour. Spread apples and raisins on top. Roll up the dough from the narrow side. Spread with condensed milk. Place on a baking tray lined with baking paper. Bake in the preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/gas: level 3) for 12-15 minutes
Mix the sauce powder and 2 tablespoons of water. Bring milk to the boil. Stir in sauce powder and bring to the boil again. Flavour with sweetener. Sprinkle strudel with nuts and decorate if necessary. Serve with vanilla sauce