Cauliflower and apple soup

1) Melt the butter in a saucepan, add the onions and fry gently until softened.
2) Add the cauliflower and diced apple and fry for 5 more mins.
3) Add the stock cubes and milk and bring to the boil, then reduce to a simmer and cook for 5 mins, or until the cauliflower and apples are tender.
4) Use a hand blender or liquidiser to purée the soup until smooth and season.
5) Divide into bowls and swirl 1 tbsp cream in each along with a drizzle of oil.