Crumble over the stock cubes, add 1 litre/1¾ pints water and ... Remove the pan from the heat. Blitz the soup with a stick blender until very smooth and season with plenty of ground black pepper.
To prepare the Truffle Soup: Preheat the oven to 220 degrees celcius. Place the prepared vegetables and the cubes of beef in a small soup bowl. Place the truffles --cut into large and small slices ...