I've copied the Hippocrates Soup ingredients and directions from the Gerson Therapy Handbook for you. Here it is:
For 1 person use a 4-quart pot, use the following vegetables, then cover with DISTILLED water:
1 medium celery knob
(substitute 3-4 stalks of celery)
1 medium parsley root
garlic as desired
2 small leeks
1 ½ lbs tomatoes or more
2 medium onions
a little parsley
Do not peel any of these vegetables; just wash and scrub them well and cut them coarsely; simmer them slowly for 2 hours, then put through food mill in small portions; scarcely any fibers should be left. Vary the amount of water used for cooking according to taste and desired consistency. Keep well covered in refrigerator no longer than 2 days. Warm up as much as needed each time.
Note: Forrecipes which call for soup stock use the liqud from this special soup.