Coat a piece of aluminium foil with oil. Caramelise 100 g sugar in a pan. Turn the walnuts in it, put them one by one on the aluminium foil and let them cool down
Cut the watercress leaves from the bunch. Sort the leaves, wash and drain. Cut the rind off the cheese. Cut the cheese into cubes. Mix vinegar with mustard, season with salt, pepper and sugar. Fold in the oil
Remove the nuts from the foil and mix with cress, cheese and vinaigrette. Season and arrange salad again