1. Use any mixture of vegetables, outside leaves of cabbage, cauliflower salks, outside celery stalks and leaves, green tops of leeks, watercress stalks, as well as the more usual vegetables. Chop or shred the vegetables.
2. Boil enough water to cover and add the vegetables to water. Cover and let boil for 20 to 30 minutes.
3. Strain and use.
