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

In a mixing bowl, combine the chopped spinach, Parmesan cheese, salt, and pepper. Add garlic powder or crushed red pepper if desired.

Roll out the puff pastry on a lightly floured surface until about 1/8 inch thick.

Cut the pastry into 1-inch-wide strips with a sharp knife.

Spoon filling onto one end of each pastry strip, fold over, and twist.

Brush each twist with beaten egg for a glossy finish.

Bake twists for 15–20 minutes until golden brown and puffed.

Cool on a wire rack for a few minutes before serving.