Preheat oven to 350°.
Spray a 9- by 13-inch pan or 4 (5-inch) ramekins with nonstick cooking spray and set aside.
In a large bowl, whisk together the oats, salt, baking powder, pumpkin pie spice, pecans and brown sugar. In another bowl, beat together the milk, eggs, mashed bananas and maple syrup. Pour wet ingredients into dry ingredients and mix well. Pour oatmeal into prepared dish(es) and drizzle melted butter over top. Stir gently and place in oven for 45–55 minutes, until golden brown and fluffy.