Apple Tart (TM5)

Pastry

• 75 g unsalted butter, cold, diced, plus extra for greasing
• 170 g plain flour, plus extra for dusting
• 1 pinch fine sea salt
• ½ tsp vanilla sugar, homemade
  或 ¼ tsp natural vanilla extract
• 50 g water

Topping

• 1000 g apples (e.g. Granny Smith, Braeburn, Pink Lady, Pippin)
• 30 g Demerara sugar
• 10 g unsalted butter, diced