Clean and slice squash, leeks and celery and add to boiling water. Add Vegeta Natur beef bouillon cube and cook about 10 minutes.
Remove from heat and place in a blender, add celery leaves, and blend for several minutes.
Drizzle prepared soup with a few drops of pumpkinseed oil and sprinkle with pumpkin seeds and serve immediately.
You can replace leeks with onions.