Slices of tongue into pieces, onion into slices. Dice the pickles. Divide the apple into thin wedges. Quarter the mushrooms. Put in a bowl.
Mix the marinade ingredients and season to taste. Pour everything over the salad ingredients. Let it go for a while.
In the meantime, wash and clean the fennel and cut off the roots. Carefully peel off the leaves. Fill the lettuce into 4 undamaged leaves. Save the remaining fennel for another dish.
Tip: You can also prepare the tongue salad with an egg and herb sauce: Mix 1 cup of skimmed milk yoghurt with 4 tablespoons of mayonnaise, salt, pepper, 2 chopped eggs and herbs.