Cut the fresh salmon into very fine cubes, mix with chives, shallots, mustard, wine vinegar, juice of one lemon, salt and pepper and season. Roll the salmon tartare in a slice of smoked salmon.
For the sauce, blend room temperature crème fraîche with pepper, mustard, watercress and salt.
Dressing: Arrange the salmon tartare on the watercress sauce and bring to the table with a smattering of salad garnish.
Drinking tip: Strong champagne, which may be a bit riper.
Tip: As an alternative to the fresh chives, you can also use the freeze-dried.