1. Preheat the oven to 350ºF and place the oven rack in the middle position. Line an 8×8 baking pan with parchment paper, leaving extra hanging over the sides. Spray lightly with cooking spray.

2. Combine the almond flour, 1/4 cup of sugar, 3 tablespoons of cornstarch, and salt in a food processor with a chopping blade. Pulse the mixture 5 times to combine the dry ingredients.

3. Sprinkle 6 tablespoons of the cold butter cubes over the almond flour mixture and pulse the food processor about 25 times or until the dough resembles wet sand.

4. Pour the mixture into the baking pan and press it evenly over the bottom of the pan.

5. Bake the crust for 15 minutes or until it turns light gold. Remove the pan from the oven.

6. While the crust bakes, toss the sliced apples with the remaining 2 tablespoons cornstarch, 2 tablespoons of sugar, cinnamon, and nutmeg. Gently mix to combine.

7. Place the oats, brown sugar, almonds, and the remaining 4 tablespoons of cold butter cubes in the food processor. Pulse 15 times to combine the streusel.

8. Place the apples over the slightly cooled cooked crust. Sprinkle the streusel topping over the apples and gently pat everything down with a spatula. Bake for 35 to 40 minutes or until the topping is light gold.

9. Let the apple crisp cool and then refrigerate for at least 4 hours. Lift the crisp out of the pan using the edges of the parchment paper. Cut into 12 pieces.