Puff pastry should be defrosted according to the package instructions.
Preheat oven to 425°F
Place parchment paper on a large baking sheet and set aside.
Mix together the sausage, breadcrumbs, 1 egg and salt in a bowl.
Divide into six equal parts and place aside.
Pat your dough out on a floured surface. Then roll it out lightly so that it becomes thinner. Finally, cut into three long rectangles.
Place the sausage in the middle of each section, leaving about an inch of pastry between them.
Place sides together, pinch to seal and pat down lightly. Repeat with remaining sausages and dough.
To create venting holes, cut 6 pieces of "log" about 2 inches in length and then use a knife to pierce the top.
Place 2 inch apart sausage rolls on prepared baking sheet.
Mix egg and water in a small bowl. Brush the tops of the sausage rolls with egg mixture and bake for 20 minutes, until pastry is puffy and edges are golden.