Preheat the oven to 375 degrees F and butter
a 10-inch round cake pan
together the butter, sugar, eggs
, flour, almonds, milk, vanilla, boiling water and baking powder in a food processor
, running it for 10 seconds. Run a spatula
round the bowl and process for 5 seconds more. Pour into the prepared pan.
Scatter the prunes evenly on the batter. Spoon over walnut and sugar mixture. Arrange the apple slices on top of the walnuts
. Bake for 45 minutes.
Sprinkle the surface with sugar and cinnamon. Dot
with butter and bake for 20 to 25 minutes more, or until a skewer
comes out clean. Cool in the tin.