Peel, wash and chop the potatoes. Clean, wash and cut the cauliflower into florets. Boil up the stock. Cook the cauliflower for about 10 minutes, remove with a skimmer. Cook potatoes in the broth for about 15 minutes
In the meantime, knead the minced meat, breadcrumbs, mustard, ketchup, salt and pepper. Form approx. 16 balls from the minced meat mixture. Heat the oil in a pan. Fry the meatballs for about 5 minutes while turning them over.
Take the pot of potatoes off the heat. Add half the cauliflower again. Puree both in the broth with a hand blender. Bring to the boil again. Stir in cheese and let it melt. Season soup with curry, salt and pepper. Add the rest of the cauliflower and warm up briefly
Wash the chives, shake dry and cut into fine rolls. Fill the soup into small bowls, spread meatballs and chives on top