Bring 1/4 litre of water to the boil, dissolve the broth in it, let it cool down. Wash and clean the cucumber. Put a piece (about 6 cm) aside. Peel the rest of the cucumber and cut it roughly into pieces. Wash the dill, pluck the little flags from the stalks. Put something aside for garnishing. Puree cucumber and dill and mix with broth, lemon juice and 75 g crème fraîche.
Season to taste with salt, pepper and nutmeg. Chill the cucumber soup for at least 30 minutes. Cut the rest of the cucumber into small cubes. Cut salmon into strips. Arrange the soup in bowls and add a dash of crème fraîche to each. Garnish with cucumber pieces, salmon strips and remaining dill. Delicious with baguette