• Preheat the oven to 350º F. Line the bottom of the oven with foil to catch any juices that may bubble over.
• Place a pie crust into 9 inch pie plate. 

Prepare Apple Filling

• In a large bowl toss together the apples, brown sugar, granulated sugar and cinnamon. Sprinkle with flour to coat apples. Pour into the pie crust, piling the apple mixture high. The filling will reduce down as it bakes.

Prepare the Crisp Topping

• Mix the flour, oatmeal, brown sugar, cinnamon and salt in a bowl. 
• Add the cold, cubed butter and cut it into the dry ingredients with a pastry cutter. Don’t over-mix, you want coarse crumbs with some larger pieces of butter and crumble. 
• Sprinkle evenly over the apple filling. I layer it on quite thick.
• Bake for 1 hour - 1 hour 15  mins in 350º F oven. The oatmeal topping is golden brown, and the apple filling is bubbling around the edges. The apples should be tender when pierced with a knife.
• Remove from oven and drizzle with icing glaze while pie is still warm.

Glaze (optional)

• Whisk one tablespoon of confectioners sugar with just enough milk to make a drizzle.
• Using a spoon drizzle the glaze over warm pie.