Name: Cream of mushroom soup
Prep time: 20 min
Cook time: 2 h 5 min
Total time: 2 h 25 min
Yield: Serves 4
Ingredients: 85 g (3 oz/¼ cup) sour cream or crème fraîche; crusty bread, to serve; 2 teaspoons chopped marjoram, plus extra leaves, to garnish; 1 litre (35 fl oz/4 cups) good-quality vegetable stock; 10 g (¼ oz) dried porcini mushrooms; 125 ml (4 fl oz/½ cup) Madeira (see Tip); 300 g (10½ oz) large mushroom flats, coarsely chopped; 200 g (7 oz) Swiss brown mushrooms, coarsely chopped; 1 leek, white part only, washed, thinly sliced