For homemade soup cubes, remove the peel from the onions and chop coarsely. Grind finely with the sea salt in a blitz chopper. Clean the carrots and separate the celery from the peel, rinse the leek. Coarsely chop all ingredients and mix with the onion-salt mixture.
Preheat the oven to 75° Celsius.
Rinse, dry and coarsely chop the parsley leaves. Rinse the tomatoes, cut them in half and cut out the stalk. Then cut into small pieces and add to the remaining vegetable-salt mixture along with the parsley.
Spread the mixture on a baking sheet lined with baking paper and let it dry out well in the oven for about 10 hours.
Then grind the mixture very finely and put it in a screw jar. In it you can keep it for several weeks.
These soup cubes are only for seasoning, not for making soup with it.
Dosage: 1 level tsp of powder to 200 ml of tap water.