Preheat oven to 350 degrees and spray and 8x8 baking dish with cooking spray.
In a large mixing bowl, mix oats, brown sugar, baking powder, salt, cinnamon, cloves and ginger.
In a medium bowl whisk together the milk, pumpkin, maple syrup, egg and vanilla.
Pour milk mixture over the oat mixture and stir to combine.
Add the butter a to the oat mixture a little at a time if it is still warm so as not to cook the eggs. I add it in about 3 portions, stirring to combine after each one.
Pour into prepare baking dish.
Bake for about 40 minutes until golden and set.
Notes
This recipe doubles beautifully. I make the double batch in a 13x9 pan and bake for 45-50 minutes until the middle is totally set.