Step 1 Preheat the oven to 220°C.
Step 2 In a bowl, combine the fresh breadcrumbs, herbs, salt, bran flakes, onion, meat, grated potato and the sauces.
If you have a processor, chop the onion, add the slices of bread and pulse to crumbs, then add all the rest of the ingredients and mix in the processor.
Step 3 Slice each pastry sheet in half, making 6 rectangles. Scoop out some of the meat mixture and place a ‘sausage’ of mixture along the middle of each strip. Brush one edge of the strip with water, roll the pastry over and seal it together to form a long roll.
Step 4 Cut the rolls into four sausage rolls. Place them seam side down on a greased tray. Slash the top of each sausage roll once or twice with a serrated knife to allow steam to escape, then brush each one lightly with milk.
Step 5 Bake in the preheated oven for 20-25 minutes, or until dark golden. Serve with tomato sauce for dipping.