Preheat oven to 350F. Spray a 9 x 5 inch loaf pan with baking spray.

In a medium bowl, combine flour, sugar, baking soda, pumpkin spice, nutmeg, cinnamon, and salt. Set aside.

In a large bowl, mix oil, egg whites, pumpkin puree, and vanilla until well combined.

Gradually add the dry ingredients into the wet mixture, blending at low speed until just combined.

Pour batter into the prepared loaf pan, sprinkle with pepitas, and bake for 50-65 minutes until a toothpick inserted in the center comes out clean.

Allow bread to cool for at least 20 minutes before slicing.