Combine the apple, sugar and cinnamon in a small bowl. Mix until the apples are completely coated.
Cut both sheets of puff pastry in quarters so each sheet has four squares. Spoon the apple mixture onto each square and brush the edges with the egg.
Fold each square over itself to form a triangle. Press down the edges and seal by pressing with a fork. Brush the tops of each triangle with the egg and sprinkle with extra sugar.
Place four triangles in the ActiFry basket. Bake at 350 degrees fahrenheit for 10-11 minutes or until they are golden brown and puffed. You will need to cook in two separate batches.
Take out and serve (optional - add icing sugar for extra sweetness).