Clean or peel, wash and chop the soup greens. Wash onion, halve with skin
Heat the oil in a large pot. Brown the onion and soup vegetables in it. Deglaze with 3/4 l water. Add spices and salt. Bring to the boil and simmer covered for about 35 minutes
In the meantime peel, wash and thinly slice the carrots. Clean, wash and cut the leek into rings
Pour the broth through a sieve and bring to the boil. Cover the carrots and leek and cook for 5-7 minutes. Season to taste with salt, pepper and Worcester sauce. Wash the parsley and remove the leaves. Sprinkle the vegetable soup with parsley
Great base for sauces: Let the vegetable soup boil down to half its original volume and freeze it in portions (e.g. in freezer bags). Heat up and extend if necessary