Preheat the oven to 165 degrees C.
Grease or spray your baking pie pan.
In a big bowl, mix the apples, nutmeg, and cinnamon together. Pour the mixture into the greased baking pan.
In another bowl, beat the milk, sugar, biscuit mix, butter, and eggs until smooth. Pour this mixture over the apples.
In a separate bowl, stir in 1 cup biscuit mix, brown sugar, nuts, and butter. Mix them until they get crumbly. Sprinkle this crumbly streusel over the top of the pie.
Bake for about 60 minutes or until the knife comes out clean when inserted in the center.