Chop the walnuts and roast them in a small pan without fat. Stir in jam. Remove from heat and let it cool down.
Scrape the top layer of mould off the cheese with a knife, so that the red smear layer of the cheese is exposed. Spread this layer first with grappa, then with mustard. Spread the walnut mixture over it and press it down a little. Put it in a cold place.
Sort the salad, wash and spin dry. Clean, wash and slice the persimmon. Cut out 1 heart from 1 slice, dice the rest. Peel and finely dice the shallot. Mix vinegar, salt and pepper. Fold in the oil. Cut cheese into slices. Mix salad with kaki cubes, shallot and vinaigrette and serve. Add the cheese and garnish with the kaki heart.