1 Preheat the stove to 200 degrees. Score the chestnuts crosswise with a sharp kitchen knife and bake in the oven on the middle shelf for about 10 minutes until the skin cracks open.
2 Peel off the shell, or perhaps use a coffee spoon to loosen the flesh from the shell. Next, remove the brown “felt”. Cut the pumpkin flesh into cubes.
3 Melt the butter in a saucepan and caramelize the chestnuts in it with the sugar, stirring for about 4 minutes.
4 Add the pumpkin and fill up with Madeira, soup, port wine and whipped cream. Simmer the soup on low heat for about 15 min. until the chestnuts are cooked soft.
5 Blend the soup with a hand blender. Season with salt, pepper and the truffle oil and blend again until really creamy.
This is how you turn the pumpkin into an attractive soup bowl: Place a pastry ring or baking dish on top and cut the pumpkin along it in a jagged shape.