Preheat oven to 375. Spray a large pie dish (10 inch) with cooking spray and set aside.
Combine dry ingredients: apples, oatmeal, baking powder, spices and salt.
In another bowl combine wet ingredients: milk, eggs, maple syrup, oil and vanilla; whisk until well combined.
Pour wet ingredients into dry ingredients and stir well.
Pour into pie pan and bake on a cookie sheet for 45 to 50 min; cover with foil for the last 5 min or so if top is getting too brown.
Cool for 10 min. Cut into wedges and eat plain or with a dollop of low fat whip cream or a drizzle of maple syrup.