Prepare the shortcrust pastry and keep it in the fridge for an hour for the cream. Mix the flour with the sugar and vanilla, add the eggs and mix with a whisk. Add milk and put on very low heat, always mix with the whisk until it thickens. Let cool. Slice the apples and pour the lemon juice over them, sprinkle a little sugar, roll out the dough in a pan and pour the cream, put the slices of apple, fill as much as possible trying to cover each hole. Pour the lemon juice on top and bake in a preheated oven at 180 ºC. for 40 minutes.