Bake in preheated oven for 30 minutes, or until golden brown.
In a food processor chop nuts with a few short pulses. Pour in sugar and flour and process to combine. Add butter and salt and process until mixture resembles coarse meal. Sprinkle topping over apples.
Place apples in a pie pan and dust with cinnamon and nutmeg. Cover with foil and bake for 20 minutes.
