Cut the smoked salmon into cubes and chop them in a mixer. Stir in egg yolk, oil, butter and yoghurt. Put the salmon puree in a bowl. Chop fresh salmon finely and add to the smoked salmon mixture. Season to taste with lemon juice, salt and pepper.
Wash dill, dab dry, chop very finely and fold in. Cover and chill for about 30 minutes. Clean, wash and drain lamb's lettuce. Clean, wash and seed the tomato and cut into small cubes. Mix vinegar, salt, pepper and sugar. Whip oil into it. Mix lamb's lettuce, tomatoes and the vinaigrette. Cut off the salmon mousse with 2 tablespoons of dumplings and arrange on plates. Arrange lamb's lettuce and tomatoes around it.
Mix vinegar, salt, pepper and sugar. Whip oil into it. Mix lamb's lettuce, tomatoes and the vinaigrette. Cut off the salmon mousse with 2 tablespoons of dumplings and arrange on plates. Arrange lamb's lettuce and tomatoes around it. Garnish with lemon slices and dill