Pre-heat the oven to 425 degrees.
Place your halved pumpkin flesh side up in a baking dish. Rub 1 tablespoon of butter over the flesh and sprinkle with ½ teaspoon sea salt, ¼ teaspoon pepper, and some cinnamon. Roast the pumpkin at 425 degrees for 50 minutes, until the flesh is fork tender and fragrant. While the pumpkin roasts, you can prepare the rest of the soup.
Melt 1 tablespoon of butter in a large soup pot over medium high heat, and add the onion, carrot, and celery with a pinch of sea salt. Cook the veggies over medium high heat, stirring occasionally until the veggies are soft and fragrant, about 5-7 minutes.
Add the garlic, thyme, and sage to the soup pot, stir to combine, and cook for a minute or two.
Add the cubed chicken and bone broth, and bring to a boil. Add the pasta, and reduce to a simmer to cook the pasta until al dente. While the pasta starts cooking, you can prepare the pumpkin to add to the broth.
Scoop the pumpkin flesh out of the shell and into your food processor or blender. Blend the pumpkin until smooth. Add the pumpkin puree to the soup pot where the pasta is cooking and stir to combine.
When the pasta is cooked to al dente, turn the heat off, add the coconut milk and chopped spinach, stir to combine, and season with salt and pepper to your taste.