Preheat oven to 350°F (175°C) and grease an 8x8 inch baking dish with coconut oil or non-stick spray.
In a large mixing bowl, combine the rolled oats, baking powder, pumpkin pie spice, and sea salt.
In a separate medium bowl, whisk together the pumpkin puree, eggs, almond milk, maple syrup, and vanilla extract until homogeneous.
Pour the liquid mixture into the dry ingredients and stir until the oats are thoroughly coated.
Transfer the oat mixture into the prepared baking dish and spread into an even layer.
Top the mixture evenly with the chopped pecans.
Bake for 35 minutes or until the top is golden brown and the center is firm to the touch.
Remove from the oven and let rest for 10 minutes to allow the structure to set before slicing.