• Preheat your oven to 350 degrees F.
• Line a 9 x 9 inch baking pan with parchment paper (making sure that the parchment paper goes up the sides too - see picture above). Set aside.

Apple Pie Filling:

• Peel, core and chop the apples into small pieces.
• Add the chopped apples, butter, water, brown sugar and cinnamon to a large skillet.

  5 cups chopped apples, 1 tbsp butter, 1 tbsp water, 2 tbsp brown sugar, 1 tsp ground cinnamon
• Simmer the apple mixture on low-medium heat for about 10-15 minutes. You want the apples soft, yet still slightly chunky.
• Set aside to cool slightly.

Oat Bar:

• In a large mixing bowl combine the flour, oats, sugar, cinnamon and salt.

  1 1/4 cups all purpose flour, 1 1/4 cups quick oats, 1/2 cup granulated sugar, 1 tsp ground cinnamon, 1/4 tsp salt
• Stir in the melted butter. Mix until combined.

  1/2 cup butter
• Measure out 1/2 cup of the oat mixture and set it aside for later (this part is the topping).
• Press the remaining oat mixture into the prepared baking pan. Press firmly and evenly into the bottom of the pan.

Putting it all together:

• Spread the cooked apple mixture evenly over the top of the bottom oat crust (see picture above).
• Sprinkle the 1/2 cup of oat mixture that was set aside, over the top of the apples. You can sprinkle it evenly or randomly over the top.
• Sprinkle with cinnamon and sugar.

  1/8 tsp ground cinnamon, 2 tsp granulated sugar
• Bake for 1 hour. The top should be golden and the apple pie mixture bubbling.
• Let cool for at least 2 hours before cutting into it (or it will be very messy).