Cook the lentils in 1 l water for 35-40 minutes. For the dressing puree yoghurt, jelly and vinegar with a hand blender. Season to taste with salt and pepper.
Wash the lettuce and drain. Cut the sausages into slices. Wash chives, dab dry, cut into small rolls.
Peel, wash and finely dice the carrots. Clean and wash the celery and cut into fine slices. Cook both for the last 3 minutes with the lentils. Then drain everything and let it cool down a little.
Mix warm lentil vegetables, sausages, salad, chives and dressing.