Directions
<ol class="no-list-style"><li class="MethodStepper"><h4 class="step-title">Step 1</h4>Start by making the pastry. Place the flour and salt in a large bowl, then add the cold cubed butter. Using your fingertips, rub the butter into the flour until the mixture resembles breadcrumbs (keeping everything as cool as possible helps create a flaky texture). Stir in the sugar, then add the egg yolk and enough ice-cold water to bring the dough together. Shape into a disc, wrap in cling film, and chill for at least 30 minutes.</li><li class="MethodStepper"><h4 class="step-title">Step 2</h4>While the pastry chills, prepare the filling. Place the sliced apples in a large bowl and toss with lemon juice to prevent browning. In a separate bowl, mix together the sugar, cinnamon, nutmeg, and cornflour, then sprinkle over the apples and toss until evenly coated. The cornflour will thicken the apple juices as they bake, preventing a soggy bottom crust.</li><li class="MethodStepper"><h4 class="step-title">Step 3</h4>Preheat your oven to 190°C (170°C fan/Gas 5). Roll out the chilled pastry on a lightly floured surface to about 3mm thickness, making it large enough to line your pie dish with some overhang. Carefully transfer to the dish, pressing it gently into the corners without stretching. Trim any excess, leaving about 1cm overhang, then fold this under and crimp the edges decoratively.</li><li class="MethodStepper"><h4 class="step-title">Step 4</h4>Line the pastry case with baking parchment and fill with baking beans or uncooked rice. Blind bake for 15 minutes, then remove the beans and parchment and bake for another 5 minutes until the base is just beginning to color. This crucial step prevents the dreaded soggy bottom by creating a barrier between the crust and juicy filling.</li><li class="MethodStepper"><h4 class="step-title">Step 5</h4>While the pastry is blind baking, make the crumble topping. In a medium bowl, rub the cold butter into the flour until the mixture resembles coarse breadcrumbs. Stir in the demerara sugar, oats and chopped nuts. The varying sizes and textures will create delightful crunch and caramelization.</li><li class="MethodStepper"><h4 class="step-title">Step 6</h4>When the pastry case is ready, fill it with the apple mixture, mounding it slightly higher in the center (the apples will shrink during baking). Sprinkle the crumble topping evenly over the apples, making sure to cover the filling completely and pressing down very gently.</li><li class="MethodStepper"><h4 class="step-title">Step 7</h4>Bake in the preheated oven for 35-40 minutes, until the crumble is golden brown and you can see the apple filling bubbling around the edges. If the topping browns too quickly, cover loosely with foil. The bubbling is an important visual cue - it means the cornflour has activated and thickened the juices.</li><li class="MethodStepper"><h4 class="step-title">Step 8</h4>Remove from the oven and let cool on a wire rack for at least 30 minutes before serving. This resting time allows the filling to set so it won't run everywhere when sliced. Serve warm with vanilla ice cream, custard, or freshly whipped cream. The pie will keep, covered, at room temperature for 2 days, or can be frozen (unbaked) for up to 3 months.</li></ol>