Apple tart

Pastry

• 75 g butter, cut into pieces, plus extra for greasing
• 150 g plain flour, plus extra for dusting
• 1 pinch salt
• ½ tsp vanilla sugar or ¼ tsp natural vanilla extract
• 50 g water

Topping

• 900 - 1000 g cooking apples, peeled, cored and cut into quarters
• 30 g caster sugar
• 10 g butter