Peel onion, pumpkin and potatoes. Wash the potatoes. Seed the pumpkin. Dice everything roughly. Wash the thyme.
Heat the oil in a pot. Sauté the onion in it. Fry pumpkin and potatoes for about 5 minutes. Pour on 1 l water. Add broth and thyme, except for a little bit. Bring to the boil, cover and simmer for about 20 minutes
Clean, wash and cut the spring onions into rings. Thyme, some pumpkin and potato pieces from the broth lift. Finely puree the soup. Season to taste with salt and pepper
Cook the spring onions in the soup for about 3 minutes. Cut the sausages into slices. Heat in the soup with potato and pumpkin pieces. Season to taste again. Garnish with remaining thyme
It's a real treat: serve the soup in a hollowed-out pumpkin. Cut off a lid, remove the seeds from the pumpkin and cut out the pulp