I have just come across this recipe for Pareve Vegetable Soup. From The Bulletin, Aug. 23, l974- an old one - all these reciopes are from the same source.
Saute onion in melted margarine in a large pot, until transparent. Add remaining vegetables except potatoes & tomatoes, and cook 10 minutes, stirring constantly. Add potatoes, water, seasonings and tomatoes. Simmer until vegetables are tender. Serve hot.