Peel and finely chop the onion. Clean, wash and slice the mushrooms. Boil eggs hard for about 10 minutes
Heat the fat in a saucepan. Sauté diced onions in it while stirring. Add mushrooms and fry briefly while turning. Dust with flour and sauté
Deglaze everything with 3/8 l water and cream and bring to the boil. Stir in broth and mustard and simmer for about 5 minutes. Stir from time to time. Season to taste with salt, pepper and sugar
Cut the salmon into thin strips or dice it finely. Wash the dill and, except for something to garnish, cut finely
Rinse the eggs cold, peel them and halve them as desired. Add eggs, salmon and dill to the sauce. Garnish with the rest of the dill and possibly lemon. Tastes good with white bread or grainy rice
Drink: dry white wine