Preheat
the oven to 350°F/180°C/gas 4. Butter and flour a
9-inch (23-cm) spring form
pan.
Sift the flour, custard powder, baking
powder, baking soda, and salt into a medium bowl.
Beat the butter and confectioners' sugar in a large
bowl with an electric mixer at medium speed until
creamy.
Add the eggs, beating until just blended.
With mixer at low speed, gradually beat in the
pecans and dry ingredients.
Spoon the batter into the prepared pan.
Arrange the apple slices over the batter.
Bake for
40-50
minutes, or until a toothpick inserted into the
center comes out clean.
Cool the cake in the pan on a rack for 10 minutes.
Loosen and remove the pan sides and
let cool completely.
Warm the jam and brandy in
a small saucepan. Drizzle over the cake and serve.