Step 1: Melt butter in a saucepan. Add cauliflower, pepper, onion and celery. Cook over a low heat for 10 minutes, without browning.
Step 2: Mix in curry powder and stock. Stir in cornflour mixture. Simmer for 10 minutes or until soup thickens and vegetables are tender.
Step 3: (Approximately 133 calories per serving)