Wash, clean and roughly chop all ingredients. Chop the onions and peel the garlic.
Heat the oil and add the vegetables, fry briefly. Then add 3 liters of water. Add the spices and cook gently in an open pot over medium heat for at least 1 1/2 hours. The liquid is then reduced to approx. 2 liters.
Then drain through a sieve and let cool. The broth can be kept in the refrigerator for approx. 4 - 5 days.