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

Roll pastry into a 10x10-inch square and cut into four equal squares.

Spoon about 1 tbsp sauce into center of each square, leaving a border.

Top with ~3 tbsp mozzarella and 4–6 pepperoni slices; sprinkle Italian seasoning.

Fold corners to center, pinching to seal and brushing with egg wash.

Bake 15–18 minutes until golden; cool 5 minutes before serving.