Peel, wash and cut the celery and carrots into large pieces. Peel and quarter onions and garlic. Put prepared ingredients, wine, bay leaf and veal in a pot. Cover with water.
Season with salt and pepper, bring to the boil briefly and simmer covered for about 50 minutes. Let 75-100 ml of the stock cool down. For the sauce drain the tuna. Add 1/2 tablespoon capers, stock and mayonnaise and puree.
Season to taste with salt, pepper and lemon juice. Wash parsley, cut 4 leaves into fine strips. Cut the roast thinly and serve in portions with the sauce. Sprinkle with remaining capers, parsley strips and pink berries.
Serve garnished with parsley leaves, caper apples and lemon.