German pumpkin festival soup

1 kg pumpkin roasted in oven
2 potatoes yukons
1 onion chopped
2 tbsp butter
Salt
Cinnamon stick
1 to 1.5tsp Ground coriander
pepper
1tsp cumin
1 branch thyme
1 liter vegetable broth - plus extra water to thin it out if needed
1 pint heavy cream
pumpkin seed oil or balsamic glaze (optional)
Pumpkin seeds

Cooking Instructions German Pumpkin Soup
-roast pumpkins 350 about an hour
- Peel potatoes, cut in small pieces.
- Sautee onion in butter until soft.
- put everything in pot and simmer on low about an hour.
- Take out cinnamon stick and thyme branch
- blend!
- sprinkle pumpkin seeds and oil