01 - Preheat the oven to 350°F. Grease and line a 9-inch round cake pan with parchment paper.
02 - In a large bowl, whisk together flour, baking powder, salt, cinnamon, and nuteg.
03 - Add cold butter cubes and rub into the flour mixture with your fingertips until it resembles coarse breadcrumbs.
04 - Stir in 3/4 cup sugar and the sliced apples, tossing to coat the apples evenly.
05 - In a small bowl, beat eggs, milk, and vanilla extract together.
06 - Pour the wet mixture into the dry ingredients and fold gently until just combined. Do not overmix.
07 - Transfer the batter to the prepared pan, smoothing the top. Sprinkle with 2 tablespoons sugar.
08 - Bake for 45-50 minutes, or until the cake is golden and a skewer inserted in the center comes out clean.
09 - While the cake bakes, prepare the custard. In a saucepan, heat milk and cream over medium heat until just simmering.
10 - In a bowl, whisk egg yolks, sugar, and cornstarch until pale and smooth.
11 - Gradually pour the hot milk mixture into the yolks, whisking constantly.
12 - Return the mixture to the saucepan and cook over low heat, stirring constantly, until thickened. Do not boil.
13 - Remove from heat and stir in vanilla extract.
14 - Allow the cake to cool slightly before serving warm slices with generous spoonfuls of vanilla custard.