Heat the oil in a heavy based pan

Add the finely chopped onion and garlic season with salt and pepper and sauté for 5 - 10 mins until the onion has softened

Add the wine and water and simmer for 20 mins

Clean the mushrooms and slice thinly then add them to the pan and cook for a further 10 mins

Place everything in a serving dish and set aside to cool before placing it in the fridge - serve cold