Peel and quarter onions and garlic. Clean or peel, wash and roughly dice the soup vegetables
Bring 1/2 l water to the boil with white wine, bay leaf, salt and pepper. Rinse the meat and simmer covered for about 50 minutes. Let cool off in the stock. Measure 75-100 ml of the brew
Drain the tuna. Puree with 1/2 tablespoon capers, stock and mayonnaise. Season to taste with salt, pepper and lemon juice
Chop half the parsley. Cut the meat into thin slices. Serve with sauce, parsley, rest of capers and lemon. Serve with crispy ciabatta
Drink: cool white wine