Preheat oven to 425 degrees
Line one nine-inch pie plate with dough, should overhang an inch or more
Tuck dough under rim and crimp
Mix all filling (custard) ingredients but apples and berries
Mix fruit together in separate bowl
Pour custard mixture over fruit and mix gently
Spoon mixture in to pie shell, and top with enough custard to leave half inch space below crimping.
Place pie in oven, bake for 15 minutes
Make crumble topping: mix together all ingredients
After 15 minutes, reduce heat to 350 degrees
And add crumble mixture evenly across the top of the pie
Bake for about 35-45 minutes until firm
Let cool to lightly warm or room temperature and serve.
Refrigerate (if any is left)
