Cut the pumpkin into 1 inch cubes and slice the leek, ginger and garlic.
Heat the olive oil in a large pan and sauté the pumpkin for 4 minutes. Add the leeks and ginger and stir regularly. After 4 minutes add the garlic and continue for another 4 minutes. Add the broth (or water) and simmer for 10 minutes with the lid closed.
Mash everything with a hand blender or transfer the entire content of the pan in a high-speed blender or food processor and your pumpkin soup is ready!
Serving
Serve it plain, with freshly ground pepper, croutons, or accompany it with toasted bread.
Notes
If you want it runnier, add an extra half or a full cup of broth or water.
If you want it spicier, add extra fresh or ground ginger.