Mix together the salt, sugar, and peppercorns in a small bowl. Rub a handful of the mixture on both sides of the salmon, place it in a shallow dish, and sprinkle with the remaining salt mixture.
Put the cream cheese in a bowl and mix in the cucumber, radish, chives, horseradish sauce and mustard. Season to taste. Stamp or cut out rounds from the soda bread that are each about 6cm in ...