Turn the heat up and add a little more oil. Add the mushrooms, including the drained porcini and cook for 5 minutes or until lightly coloured and soft.
Pour in the wine and reduce then add the reserved mushroom liquid and boil for 6-8 minutes. Finish off with the butter and Bulla Sour Cream and allow to thicken over a medium heat.
Serve on a large platter with a sprinkle of chives and accompanied with mashed potato, rice or pasta.