Preheat oven to 200°C. Wash and peel the potatoes and cut into cubes. Clean broccoli, wash and divide into florets. Bring water to boil and dissolve clear soup with greens in it. Add potatoes and cook for 10 minutes. Add broccoli and cook for another 5 min.
Drain vegetables, collect cooking liquid. Cut salmon fillet into cubes, mix with vegetables and place in an ovenproof dish. Fill up cooking liquid with water to ½ l liquid. Stir in Fix für Brokkoli Gratin, bring to boil and season with pepper. Pour over the vegetables. Sprinkle cheese on top and bake in oven for approx. 20 min.