Prep fruit and gently mix with sugar. Set aside.
For crumble:
In large bowl, whisk together dry ingredients (flour, sugar, cornmeal, salt and baking powder).
Cut cold butter into cubes, and using pasty blender or fork, cut butter into flour mixture. Mix until crumbly.
Using a fork, mix together egg and milk until combined.
Add egg mixture into flour/butter mixture and combine. Mixture should still be fairly crumbly.
Press about 2/3 of crumble mixture into bottom/sides of deep dish pie pan.
Add peach/berry mixture.
Top with remaining crumble (do not press, leave loose).
Bake in preheated 350* for 45-50 minutes or until golden brown.
Enjoy!