Preheat oven to 350.
Line an 8x8 baking dish with parchment paper (spray inside of the dish with cooking spray so paper sticks).
Chop apples into small cubes and set aside.
In a medium bowl, whisk together almond milk, maple syrup, melted coconut oil, and eggs.
Add the oats, baking powder, cinnamon, and sea salt, and stir together until fully incorporated.
Sprinkle some apple cubes into the bottom of the baking dish.
Pour oatmeal mixture on top.
Add remaining apples, raisins and walnuts.
Bake for 40-ish minutes until cooked through.
If you are going to cut them into squares, let it cool before slicing. Otherwise dig in!
Store in the refrigerator for up to one week.