Preheat oven to 350 degrees F.
Add the rolled oats, Splenda, baking powder, cinnamon and salt to a mixing bowl. Stir together.
In a separate mixing bowl add the almond milk, egg, applesauce, vanilla extract, lemon zest and lemon juice. Whisk the ingredients together.
Slowly add the wet ingredients to the dry ingredients while stirring.
Fold in the blueberries.
Spray a pie pan with no-stick cooking spray and add the oatmeal mixture.
Bake for 25 minutes.
Let it cool for 5 minutes before eating.