Apple crumble meringue slice

Shortcrust pastry

• 200 g unsalted butter, chilled and cut into pieces, plus extra for greasing
• 400 g plain flour
• 4 egg yolks
• 1 tsp baking powder
• 1 tsp natural vanilla extract
• 50 g icing sugar

Apple mixture

• 1500 g apples, peeled, cores removed and cut into quarters (approx. 1800 g before preparation)
• ½ tsp ground cinnamon, plus extra for dusting
• 40 g sugar

Meringue filling

• 4 egg whites
• 150 g icing sugar