Preheat your oven to 350°F (175°C) and lightly grease a 9×13 inch baking dish with coconut oil.
Prepare the apple filling by combining the sliced apples, maple syrup, and lemon juice in a large bowl. Toss gently to coat the apples evenly.
Create your chai spice blend by mixing the cinnamon, ginger, cardamom, cloves, nutmeg, and black pepper in a small bowl. Sprinkle over the apple mixture and stir to distribute the spices evenly.
Add the cornstarch to the spiced apples and toss until no dry white spots remain. This will help thicken the juices as the apples bake.
Transfer the apple mixture to your prepared baking dish, spreading it out in an even layer.
Make the crisp topping by combining the rolled oats, almond flour, chopped nuts, coconut sugar, and salt in a medium bowl. Mix well.
Pour in the melted coconut oil, maple syrup, and vanilla over the dry ingredients. Stir until everything is moistened and clumps begin to form.
Sprinkle the topping evenly over the apples, covering the entire surface. Don’t press it down—those little gaps allow steam to escape.
Bake for 40-45 minutes until the topping is golden brown and the apple filling is bubbling around the edges. If the topping starts browning too quickly, loosely cover with foil.
Allow to cool for at least 15 minutes before serving, as this helps the filling set up and prevents burned mouths!