Preheat oven to 350 F. Spray a square baking dish with non stick spray.
In a large bowl, combine oats, salt, cinnamon, ginger, baking powder and brown sugar. Stir to combine.
In another bowl, combine sweet potato, egg, butter, vanilla and milk. Whisk together until thoroughly combined.
Add raisins and mix to combine.
Transfer to baking dish.
Transfer to oven and bake for 40 minutes.