Apple turnovers - with cream filled option!

Bahan-bahan (8 porsi)

• 4 G ranny Smith apples (, peeled, diced into 1.25cm cubes, 6 cups (Note 1))
• 2 tsp cornflour/cornstarch ((thickens sauce))
• 1 tsp cinnamon
• 1/2 cup white sugar
• 1/2 tsp vanilla extract
• Pinch salt
• 2 square puff pastry sheets ( (25 cm/10"), butter best (Note 3))
• 1 egg (, whisked)
• 2 batches Stabilised whipped cream OR stiff whipped cream ((Note 3))
• 1 batch Whipped cream for dunking ( - for easy option (Note 4))
• Icing sugar / powdered sugar (, for dusting (optional))