Drain the tangerines, collecting the juice. Wash apples and pears, quarter them and remove seeds. Cut the fruit flesh into pieces or slices as desired. Sprinkle with lemon juice. Melt the sugar in a pan until golden brown.
Deglaze with 5 tablespoons of mandarin juice and cook for 2-3 minutes. Fold in the walnuts, take them out and let them dry. Coarsely chop some walnut kernels. Mix fruit and caramelized walnuts and arrange on dessert plates. Whip cream and vanilla sugar until semi-stiff and spread on the fruit salad