Wash the salmon, dab dry. Wash the dill and cut finely. Mix salt, sugar, dill and pepper. Place one half of the salmon, skin down, in a flat glass bowl. Spread the seasoning mixture over it.
Place the second half with the meat side on top. Cover salmon with foil. Place a board or plate on top and weigh down. Leave to stand in the refrigerator for approx. 2 days, turning 2-3 times so that the marinade is distributed.
Remove the salmon, dab dry and cut off the skin in strips about 1 cm wide. Arrange on a board and garnish with dill and lemon slices. For the sauce, mix egg yolk, mustard, honey and lemon squirts with the whisks of the hand mixer.
Gradually stir in the oil. Add 6 tablespoons of warm water. Wash the dill, chop finely and fold into the sauce.