Preheat oven to 200℃/392℉.
Cut the puff pastry into 2-3 cm/1 inch slices. Twist roughly and place on baking paper on baking trays.
Cover with cheese, lightly pressing into the pastry. It's fine if some of the parmesan spills over as it will still attach to the twists and go crispy. Some people use an egg wash on the pastry, but I don't think it needs it.
Bake until cheese is melted and lightly brown all over, 5-10 minutes. Watch they don't go too dark.