Preheat oven to 350 degrees F. Grease an 8x8-inch baking dish with nonstick cooking spray and set aside.
In a large bowl, combine the oats, brown sugar, cinnamon, baking powder, and salt.
In a medium bowl, combine the milk, applesauce, melted butter, egg, and vanilla.
Add the milk mixture to oat mixture; stir well. Stir in raisins or dried cranberries. Pour the oatmeal mixture into prepared pan and bake for 30 to 35 minutes or until oatmeal is set and golden brown.
Notes
if you want to double the recipe, make it in a 9x13-inch pan and double the ingredients. Feel free to add nuts or use fresh or frozen fruit instead of the dried fruit.Store the baked oatmeal in the refrigerator for up to 7 days. You can also freeze it for up to 3 months.