Preheat your oven to 400°F (200°C).

In a skillet over medium heat, add olive oil, then add onion and garlic. Sauté for 3–4 minutes until translucent.

In a mixing bowl, combine sautéed onion and garlic with sausage meat, sage, thyme, black pepper, and salt. Mix thoroughly.

Roll out the puff pastry into a rectangle about 12x14 inches, then slice into 3x4 inch rectangles.

Place 2 tablespoons of filling onto each pastry rectangle. Fold pastry over filling and seal edges.

Brush with beaten egg, then place on a baking sheet lined with parchment paper.

Bake for 20–25 minutes until golden brown. Keep an eye on them.

Allow to cool slightly before serving. Optionally serve with mustard or cranberry sauce.