Pre heat the oven to 190 degrees C. Roll the pastry out into a long thin oblong – not too thick– you want to have around the thickness of a 50p coin, a little thicker if you can manage it – these sausage rolls are to be short and plump. Carefully using your hands arrange the meat down the middle of the pastry.
Egg wash down one side of the pastry visible under the meat, then flip the top of the pastry over and stick it down so the meat is trapped inside, use a fork to crimp along that edge.
Now, egg wash the top of the pastry and using a very sharp bread or pastry knife score through the pastry every 5mm or so.
You can now if you wish garnish the tops of your sausage roll with a few nigella seeds or fennel seeds or / and flaky salt – cumin works quite well too – or you can just leave them plain. Using your sharp pastry knife again cut the giant sausage roll you have made in half, then cut each half into as many pieces as you want – I think three works well so you end up with 6 good sausage rolls – place the cut rolls on the baking sheet and bake for about 20 – 25 mins until golden brown. Remove them from the oven and allow them at least 10 mins cooling time on a wire cooling rack before you give in and scoff one.