Preheat oven to 375 degrees. Spray a 9x9 or 7x11 pan very well with cooking or baking spray.
I mix this oatmeal right in the pan. You can do it that way, or mix in a separate bowl and add to the pan.
First, add the oats, cinnamon (optional), baking powder and salt. Stir to combine.
Next, whisk together the milk, eggs and vanilla.
Top with fruit. Bake for 35-40 minutes. Jiggle to make sure the center is set and use a toothpick as well to test the center. It should come out clean.
Allow to cool. Top with brown sugar, maple syrup, nuts, etc.