Mix yoghurt, mustard, lemon juice, salt, pepper and some sugar. Whip cream until semi-stiff and fold in. Season to taste
Roughly chop the nuts. Wash the grapes and halve depending on size. Peel and wash celery. Wash and core apples. Cut or slice celery and apples into fine strips. Mix everything with the sauce and let it stand for a short time
Wash the lettuce leaves, dab dry and place in 4 glasses. Season salad again and distribute in the glasses. Crispy baguette tastes good with it