Preheat your oven to 400°F (200°C) and line a baking sheet with parchment paper.

Roll out the thawed frozen puff pastry on a lightly floured surface to smooth out any creases.

Spread the mixed berry preserves evenly over the puff pastry, leaving a 1-inch border.

Combine melted butter with vanilla extract and brush this mixture gently over the preserves.

Slice the pastry into 8 equal strips and twist each strip into a spiral shape.

Place the twisted pastries on the lined baking sheet, brush each with the beaten egg, and sprinkle granulated sugar on top.

Bake in the preheated oven for 20-25 minutes until golden and crispy.

Remove from the oven and let cool for about 5 minutes before serving warm.