Preheat oven to 325°F and line a muffin pan with paper liners.
Add ½ cup rolled oats to the bowl of a food processor. Process oats into a coarse flour. Add almond flour, sweetener, baking powder, ground spices and salt. Pulse to combine.
Add butternut squash, eggs and almond milk and pulse until mixture is combined and no dry flour remains. Use a spatula to fold in ½ cup pecans.
Scoop batter evenly among muffin cups and sprinkle each with remaining oats and pecans.
Bake for 20 to 22 minutes, or until a toothpick inserted in the center comes out clean.