Preheat the oven to 400F.
Take two cups of the apples and place in a non-stick frying pan, sprinkle lilghtly with brown sugar. As the soften, flip gently.
Mix the oats, spices, and sugars and gently toss the uncooked apples in the mix.
Once the cooked apples have softened, if there is liquid in a pan, use a slotted spoon to remove and add to the uncooked apples. Tossing gently to mix. Pull out about 6 nice slices and set aside.
Sprinkle the two tablespoons over the bottom half of a deep dish pie crust.
Add half the apples, flattening into layers, dot with half the butter.
Add the remaining apples, flattening again, and dot with the rest of the butter.
Top with the nice slices that you set aside.
Brush the edge of the crust with your egg mixture, place the top crust on top, sealing the edge. Cut vents into the top of the pie.
Give the top of the crust a brush with the egg, then sprinkle sugar and cinnamon on top.
Place the pie plate on a parchment covered cookie sheet (this will capture any drippings). Bake at 400F for 10 minutes, then lower heat to 375 and bake an additional 40-50 minutes (until the crust is golden brown).