Peel and core the apples. Use a sharp knife to slice the apples into equal ⅛ inch (3-4mm) slices. 1.4 kg apples, 100 g granulated sugar, ½ Tablespoon lemon juice
Add the apple slices to a large bowl and add the lemon juice and sugar. Toss together to coat, then let them macerate for an hour at room temperature.
Preheat the oven to 425°F/220°C.
On a lightly floured work surface, roll out one portion of pie crust into a 12-inch circle and drape it over a 9-inch pie pan, leaving an overhang. Place this in the fridge while you continue the apples. 1 double unbaked pie crust
Balance a fine-mesh strainer over a bowl and drain the apples from their juices, collecting all the liquid. Place the apples back in the bowl and set aside.
Pour the juices into a small saucepan placed over medium heat and simmer until reduced by about half and just slightly syrupy, still pourable. Stir through the caramel sauce until combined. 100 g caramel sauce
To the apples in the bowl add the spices, vanilla and flour, then pour over the apple caramel sauce and toss to coat. 20 g all-purpose flour, 1 teaspoon vanilla paste, 1 ½ teaspoon ground cinnamon, 1/4 teaspoon ground nutmeg, 1/4 teaspoon ground ginger
Add the apples to the prepared pie dish. You can mound the apples up a bit in the middle of the pie to make them fit.
On a lightly floured work surface, roll out the second disc of pastry into a 12-inch circle. You can drape this second layer over the pie, or create a lattice pie crust. If you're not making a lattice top, add 2-3 slits in the top of the pastry to allow steam to escape when baking.
Cut off the uneven excess dough overhang. Leave enough overhang so you can roll and pinch together the top crust and bottom crust of the pie. Flute the edges of the pastry with your fingers.
Whisk the egg with a tablespoon of water. 1 egg + 1 tablespoon water
Use a pastry brush to brush the top of the pie with egg wash.
Bake the pie at 425°F/220°C for 15 minutes, then turn the oven down to 350°F/180°C and continue baking for a further 55-65 minutes until the apples are soft and the filling is bubbling.
If the pie crust is browning too much at the end, loosely cover with aluminum foil.
Let the pie cool down for at least 4 hours before slicing. Once the pie has cooled, I pipe a little extra caramel into the lattice gaps before serving and sprinkle with some flaky salt. Caramel sauce, Flaky salt
Serve with extra caramel sauce and vanilla ice cream.