Clean, wash and slice the chicory. Sprinkle with half the lemon juice. Clean, wash and drain the radicchio. Pluck or cut the leaves into bite-sized pieces
Coarsely chop the walnuts. Peel and finely chop the onion. Mix vinegar, salt, pepper and sugar. Fold in the oil. Stir the walnuts and diced onion into the marinade
Wash the apples and remove the cores with an apple corer (or cut the apples into thin slices and sprinkle with the remaining lemon juice
Arrange apple, chicory and radicchio with the marinade on plates. Wholemeal bread tastes good with it
Instead of walnuts, sunflower seeds, hazelnuts or peanuts also taste good