Preheat your oven to 200°C (390°F) and line a baking sheet with parchment paper.
Remove the sausage from its casing and place it in a mixing bowl. Add smoked paprika, cumin, and fresh herbs if using, then knead or mix until the spices are evenly distributed.
Unroll the puff pastry sheets on a clean surface and cut each into two long strips about 10 cm (4 inches) wide.
Divide the spiced sausage evenly and shape each portion into a log along the length of each pastry strip.
Carefully roll the pastry over the sausage, sealing the edges with a little water if needed, and pinch the seams closed. Fold the ends under gently for a tidy look.
Place the rolls seam-side down on the prepared baking sheet, spacing them apart evenly.
Brush the tops of the rolls with beaten egg to give them a shiny, golden finish.
Sprinkle sesame seeds or poppy seeds over the top for added crunch and visual appeal.
Bake in the oven for 25-30 minutes until the pastry is puffed, golden, and crisp, and the filling is cooked through.
Remove from the oven and let the sausage rolls rest for about 5 minutes before slicing into 2-3 cm (1-inch) thick pieces. Serve warm or at room temperature and enjoy the flaky, savory bites.