Mushroom soup with parmesan

Heat the oil and butter in a saucepan until foaming. Add the onion and celery, season and fry gently for 10 minutes. Turn up the heat, then stir in the mushrooms and garlic. Cook for 10 minutes more, until soft and most of the liquid has evaporated.

Pour in the stock and milk and simmer gently for a few minutes until the vegetables are tender. Transfer to a blender (or use a hand blender) and blitz until smooth. Season.

In another small pan (or in the microwave), warm the cream. Remove from the heat and stir in the cheese and a pinch of salt, until melted. Divide the soup between bowls, spoon a little parmesan cream over each and scatter with the celery leaves, if liked.