Cut bread into strips. Heat butter in a frying pan and fry bread briefly while turning. Pour onto a plate and allow to cool.
Peel onion and cut into fine, half rings. Slice beetroot into thin slices. Wash apples, dab dry and remove the core. Cut apple quarters into thin slices, sprinkle with lemon juice and mix.
Sort the salad, wash and spin dry.
Mix vinegar, mustard, honey, salt and pepper. Fold in the oil and add the onions. Cut the gorgonzola into cubes and arrange on 4 plates with the remaining salad ingredients. Spread vinaigrette over them.
Add bread.