Hard boil the egg for about 10 minutes. Then rinse with cold water, peel and cut into eighths. In the meantime peel cucumber and slice it into thin slices. Clean, wash and cut spring onions into rings. Roll up salmon slices and cut into small rolls. Wash and drain the lettuce leaves and line 4 cocktail bowls with them.
Carefully mix cucumber slices, onion rings and salmon and spread on top. For the sauce, wash and chop the dill. Mix sour cream, lemon juice and dill and season with salt and pepper. Pour over the cocktail. Serve decorated with egg eights. Serve with fresh baguette