Melt the butter in a deep container and put the onions and green onions to braise for 5 min.
Then add the garlic, chili peppers, tomatoes, potatoes and pumpkin. Leave the products to cook for 5 min., while stirring thoroughly.
Next, add the broth, sugar and remaining spices. Once it comes to a boil, lower the heat and leave the dish to simmer for 30 min.
Remove it from the stove, cool a little bit and blend until you get a smooth consistency. Then return the dish to the heat for a few min. to come to a boil.
If necessary, add more spices. Serve the dish with a little cream and crumbled nuts.