01 - In a large mixing bowl, whisk together the flour, salt, pumpkin pie spice, cinnamon (if using), yeast, and sugar.
02 - In a separate bowl, combine the pumpkin puree, lukewarm water, oil, and vanilla extract.
03 - Pour the wet ingredients into the dry ingredients. Stir with a wooden spoon or spatula until just combined. The dough will be sticky and shaggy.
04 - Gently fold in chopped nuts and dried fruit, if using.
05 - Cover the bowl loosely with plastic wrap or a damp towel. Let the dough rise at room temperature for 2 hours, or until doubled in size and bubbly.
06 - Line a 9x5-inch loaf pan with parchment paper or grease it lightly.
07 - Scrape the dough into the prepared loaf pan. Smooth the top with a spatula; the dough will remain sticky.
08 - Let the dough rise, uncovered, for another 30–45 minutes while the oven preheats to 375°F (190°C).
09 - Bake for 40–45 minutes, until the crust is golden brown and a toothpick inserted into the center comes out clean.
10 - Allow the bread to cool in the pan for 10 minutes, then transfer it to a wire rack to cool completely before slicing.