Preheat the oven to 350°F. Lightly spray a loaf pan with cooking spray. Set aside.
In a medium bowl, mix together the flour, sugar, baking soda, cinnamon, baking powder and salt.
In a separate bowl, mix together the oil, eggs and applesauce.
Mix the wet ingredients into the dry ingredients until fully combined. Fold in the blueberries.
Pour the batter into the prepared pan and bake for 55-65 minutes, or until a toothpick inserted comes out clean. Allow to cool in the pan for 10 minutes, then remove to cool completely on wire racks.
Notes
I use avocado oil, but any neutral oil works well.