300g/10½oz button or chestnut mushrooms, grated or finely chopped
1–2 garlic cloves, crushed
1 medium leek, finely chopped
1 large onion, finely chopped
1 tbsp finely chopped parsley
1 green pepper, finely chopped
2 tbsp plain flour
salt and freshly ground black pepper
450ml/16fl oz vegetable stock
25g/1oz butter
450ml/16fl oz milk
crusty bread, to serve