Preheat the oven to 350 degrees F. Spray a 9x9 inch baking dish with nonstick spray.
In a large bowl, whisk together the oats, sugar, baking powder, pumpkin spice and salt. In a smaller bowl, whisk together the eggs, pumpkin, milk, oil and vanilla extract. Add the wet ingredients to the dry and stir until combined. Pour the mixture in the dish.
In a small bowl, stir together the mascarpone cheese and maple syrup until combined. Don’t worry if it gets thicker. Dollop the cheese all over the top of the oatmeal. Use a spatula to gently press it in and swirl it around a bit.
Bake for 30 to 35 minutes, or until the top is golden brown and set. Remove the dish from the oven and let cool for a few minutes. Top with the toasted pecans. Scoop or slices and serve. Drizzle with cream if desired.