Add the bubbly sourdough starter and warm water to a medium bowl. Mix them together with a whisk until well combined.
Add the pumpkin puree, molasses, vanilla, cinnamon, nutmeg, and ginger to the starter and mix thoroughly to combine.
Then add the flour and salt and combine together with a stiff spatula. You can also use your hands to get the flour fully incorporated. The dough will look a little scraggly, feel dense, and stick to your fingers. Try to scrape off as much dough from your hands as possible but don't over mix it at this point.
Then mix in the toasted seeds into the bread, folding over and kneading the bread a few times till well incorporated. Gently knead the dough for about a minute to incorporate the ingredients and work the dough into a ball. Do this by folding the dough over and pressing it into the center until the dough starts to turn into a ball.
Place the dough back into the bowl and cover with plastic wrap. Let it rise overnight for 8-10 hours (around 70°F). The dough will have risen in the bowl and look puffier than it did before.
After it has risen, use your spatula and gently pull the dough from the bowl onto a lightly floured work surface. Dust your hands with flour and start at the top and fold the dough over to the center, repeating on all sides (add more flour if needed).
Line an 8-inch bowl with a towel and dust generously with flour and place bread seam side up. Cover the bowl and let it rest.
Preheat your oven to 450°F. Cut a piece of parchment paper to fit your pot, leaving excess so you can grab the bread and take it out of the pot. Place your parchment paper on the counter and cut four pieces of string, about 24 inches long. Dip the string in olive oil and run between your fingers to get rid of excess oil. Place the strings on parchment paper as shown.
Flip the bread out of the bowl and place the loaf in the center. Tie the strings (not too tightly, to allow for the bread to expand as it bakes) over the loaf so that it is divided into eight equal sections. Cut off any excess string.
With a small razor blade or serrated knife, score the bread between the sections. Pick up the parchment and carefully place your bread in the pot.
Place the lid on the pot and place it in the oven for 20 minutes. Then remove the lid and continue baking for 30 more minutes.
When the bread is done, take it out of the pot and remove the strings and discard them. Let it cool on a wire rack to cool for about 20 minutes to an hour, although we often can't wait to eat it! Store loaf in a bag on the counter, or this bread freezes beautifully.