Step 1

Heat the oil and butter in a frying pan and add the onion. Cook the onion until softened but not coloured.

Step 2

Add the garlic and the mushrooms and cook for 3–4 minutes until the mushrooms are soft but have not released their juices.

Step 3

Add the wine and reduce the volume of liquid by half.

Step 4

Stir in the crème fraîche and parsley and heat through. Season to taste and serve.