Preheat your oven to 400°F (200°C).

In a medium skillet, heat olive oil over medium heat. Sauté onion and garlic for 3-5 minutes until translucent.

In a large mixing bowl, combine sautéed onion and garlic with sausage meat, sage, thyme, pepper, and salt. Mix until well incorporated.

Roll out the puff pastry on a floured surface to 1/8-inch thickness and cut into rectangles.

Fill each pastry rectangle with a portion of the filling, roll tightly, and seal the edges.

Slice diagonal slits on the tops of the rolls, then brush with egg wash.

Bake on a lined baking sheet for 20-25 minutes until golden brown.

Allow to cool for 5 minutes on a wire rack before serving.