Preheat oven 200 °C
Cut pastry sheets in half. Roll a mince portion until 25cm long. Place down the centre of pastry. Beat remaining egg and brush edges.
Roll up to enclose filling, and cut into pieces 6 -10 depending on how long you like your sausage rolls.. Place on trays, seam side down. Brush with egg and bake for 20 mins, reduce heat to 180°C, and cook for 10 minutes until golden.