Preheat the oven 350ºF. Spray your loaf pan with oil.
In one bowl, whisk together the pumpkin, maple syrup, eggs, and vanilla.
In another bowl, sift together flour, baking powder, salt, and pumpkin pie spice.
Pour the dry ingredients into the wet ingredients, and fold together until just incorporated. Do not overmix.
Pour the batter into your prepared loaf pan.
For a perfect split after it bakes, spray a knife with oil and "cut" down the center. The batter will fill back in, but you may see a fine line of oil. When the loaf bakes, it will crack perfectly here.
Optionally, sprinkle on the pepitas for decoration.
Bake for 1 hour or until a toothpick inserted in the center comes out clean.
Cool for 5 minutes in the pan, and then remove the loaf to a cooling rack to cool completely.