1. Preheat the oven to 180°C/160˚C fan/gas mark 4. Lightly grease a large baking tray with vegetable oil or butter.
2. Cut the pastry into six squares and cut each into two triangles. Place on the prepared baking tray and brush with beaten egg. Bake for 15-20 minutes until golden.
   
3. Combine the sugar and water in a pan over a medium heat and stir unti the sugar has dissolved. Turn the heat to high and boil for 1-2 minutes. Add the berries and cook for 4-5 minutes. Allow to cool slightly.
   
4. To serve, place one pastry triangle on each of four plates. Top with some warm custard and a spoonful of berries. Finish with a second pastry triangle and dust with icing sugar.

Per Serving: 407kcals, 21.6g fat (5.6g saturated), 48.8g carbs (22.2g sugars), 5.5g protein, 2.6g fibre, 0.143g sodium