Apple Tart

Pastry

• non-stick cooking spray
• 2 ½ oz unsalted butter, diced, frozen
• 6 oz all-purpose flour, plus extra to dust
• ½ tsp sugar
• 1 pinch salt
• 1 ½ oz ice cold water

Topping

• 35 oz Granny Smith apples (Honey Crisp, Braeburn, Golden Delicious, Jonagold)
• 2 tsp lemon juice
• 2 - 3 tbsp sugar
• ½ tsp cinnamon (optional)
• 2 tbsp demerara sugar (optional)
  or 2 tbsp turbinado sugar (optional)
• 1 oz unsalted butter, diced