Preheat oven to 350 degrees. Grease two 8 x 4-inch loaf pans.In a large bowl, whisk together the pumpkin, oil, eggs, discard, and sugar until smooth. Add in the baking powder, soda, salt, cinnamon, nutmeg, ginger, and cloves and mix to combine. Stir in the flour just until combined. Divide between the two prepared pans and smooth out the tops. In a small bowl, stir together the sugar and cinnamon. Sprinkle over tops of the loaves. Bake for 50-60 minutes, until a toothpick inserted into a few places in the loaves comes out clean (be sure to test it a few times - uncooked dough pockets like to hide here!). Cool loaves in the pans completely on a metal rack. Lift the loaves out with a plastic spatula rather than inverting to keep as much cinnamon sugar on as possible.Can be stored for up to 5 days at room temperature in an airtight container or wrapped tightly.