1. Heat wok with butter. Stir-fry diced onion, carrot, potato and celery sections until golden. Add asparagus and stir fry until tendered.
2. Pour in stock. Add lemon leaves. Simmer for 30 minutes. Add fresh cream and seasonings. Stir well.
3. Pour the mixture into blender. Blend to soup. Transfer to serving bowls. Garnish with asparagus. Serve.