Mackerel fillets are rolled, as is placed inside the bay leaf and engage with a toothpick to not open. Boil steam. Tuna is drained from the oil. Anchovies washed, cleaned from the central bone and cut into small pieces with the washed and dried parsley. In a bowl put mayonnaise and add capers, paying a small part of decoration. Add chopped anchovies with parsley and mashed tuna. Stir well to obtain a smooth cream. Add salt if necessary and add a little pepper. Spread sauce on a plate on it and rank rolls mackerel, as previously cleaned of bay leaves. Top, sprinkle with grated lemon rind and decorate with capers. Sprinkled with a little oil and placed in a refrigerator for 1 hour.