Preheat oven to 350° F. In a large bowl, mix together the pumpkin puree, eggs, brown sugar, pumpkin spice, salt and baking soda until smooth. Want to make your own pumpkin puree?Learn how here.
Add the milk, and whisk until fully incorporated. Whisk in oatmeal until well mixed.
Lightly grease a baking dish or pie pan, and pour the mixture into the pan.
In a small bowl add all the ingredients for the pecan topping. Using your hands, a pastry cutter or a fork, and mix together until it resembles crumbles.
Place the crumbles on top of the oatmeal mixture, and gently press them into the oatmeal. Place the pan into the oven, and let bake for 45 minutes. The topping should be golden brown. Remove from the oven, and let cool for several minutes. Enjoy!