Preheat oven to 325 degrees F. Light coat an 8x4 inch loaf pan with baking spray.
In a large mixing bowl, whisk the oil and honey together until smooth. Add the Greek yogurt and the egg. Whisk again. Make sure the ingredients are smooth and well blended. Whisk in the pumpkin purée and vanilla.
Sprinkle the baking soda, cinnamon, nutmeg, cloves, and salt over the top, then stir to combine. Sprinkle in the flour, then gently mix, just until the flour disappears.
Spread the batter into the prepared loaf pan.
Bake the healthy pumpkin bread for 30 minutes, then remove pan and lightly tent with foil to keep the top from becoming too dark. Return the bread to the oven to continue baking for another 25 to 35 minutes (55 to 65 minutes total), until a toothpick inserted in the center comes out clean. Let the bread cool in the loaf pan for 5 minutes. Gently transfer to a wire rack. Let cool at least 30 minutes before slicing. Enjoy!
*You can substitute vanilla Greek yogurt for the plain, though the bread will be a bit sweeter. I have not tested the bread with regular yogurt (which is thinner), so I recommend sticking with the Greek.
**For the white whole wheat flour, you can substitute whole wheat pastry flour, all-purpose flour, or a blend. Regular whole wheat flour can also be used, though the bread will have a heavier texture and a more pronounced wheat taste.
TO STORE: Store pumpkin bread in an airtight storage container at room temperature for up to 3 days or in the refrigerator for 5 days.
TO FREEZE: This bread can be frozen in an airtight freezer-safe storage container for up to 3 months. Wrap the bread in plastic wrap before freezing. I also like to wrap and freeze individual slices for quick breakfasts.