Preheat the oven to 350 degrees.
In a large bowl, mix the oat flour and pumpkin pie spice.
Add the date paste, pumpkin puree, and nondairy milk and stir into a thick batter.
Pour the batter into a nonstick or parchment-lined loaf pan
To make the cinnamon crumb topping, mix the rolled oats, date paste, and cinnamon, then sprinkle it over the pumpkin bread batter in the loaf pan.
Bake the bread for 30 minutes.
Let the pumpkin bread cool in the pan for at least 20 minutes, then carefully remove it to cool completely before slicing.
Store leftovers in the refrigerator.