Heat the pumpkin seed oil in a saucepan. Sweat the beetroot, potatoes, onions and oregano in it. Add the stock, pear juice, cream, salt and pepper and cook over a medium heat for 25 minutes.
Finely puree the soup with a hand blender. Add salmon and horseradish and bring to the boil again briefly.
Feel free to withhold some cream and salmon to decorate the soup plates with a few drops of pumpkin seed oil at the end.