1. Preheat your oven to 200°C (180°C fan-forced). Line 2 large baking trays with baking paper.
2. In a large bowl, combine the sausage mince, tomato sauce, barbecue sauce, breadcrumbs, mustard powder, grated onion, and grated carrot. Mix well.
3. Cut each partially thawed puff pastry sheet in half.
4. Take about ½ cup of the mince mixture and shape it into a sausage shape. Place it along one long side of a pastry half. Roll up the pastry to enclose the filling and use your fingertips to pinch the pastry seam to seal it. Cut the roll into quarters.
5. Place the sausage rolls seam side down on one of the prepared trays, spacing them about 5mm apart. Repeat with the remaining mince mixture and pastry.
6. Bake in the preheated oven for 35 minutes or until golden brown and cooked through.
7. Serve hot with tomato sauce on the side for dipping.
Enjoy your Easy Sausage Rolls!