Preheat and Prep: Preheat your oven to 350°F (175°C). Grease and flour two 9x5 inch loaf pans.
Combine Dry Ingredients: In a large bowl, whisk together the flour, baking soda, cinnamon, nutmeg, cloves, and salt.
Combine Wet Ingredients: In a separate bowl, combine the sugar, oil, eggs, and Libby's pumpkin puree. Mix until well combined.
Combine Wet and Dry: Gradually add the wet ingredients to the dry ingredients, mixing until just combined. Be careful not to overmix, as this can result in a tough bread.
Add Nuts (Optional): Gently fold in the chopped walnuts or pecans, if using.
Bake: Divide the batter evenly between the prepared loaf pans. Bake for 50-60 minutes, or until a wooden skewer inserted into the center comes out clean.
Cool: Let the bread cool in the pans for 10 minutes before inverting them onto a wire rack to cool completely.