Wash
cauliflower and break into florets. Drop into boiling salted water and
cook until just tender, about 10 minutes. Heat butter in saucepan while
cauliflower is cooking. Add onion and celery and cook gently 5 minutes,
stirring. Add bouillon cube and hot water and bring to a boil. Combine
cold water, cornstarch and soya sauce, stirring until smooth and stir
into boiling liquid gradually. Boil 1 minute. Stir in parsley. Put
cauliflower in serving dish, pour sauce over and over.