smoked salmon with horseradish caper sauce

Ingredients

8 to 12 ounces hot-smoked salmon
2 tablespoons red onion, peeled and finely minced
2 tablespoons capers, drained and chopped
1 tablespoon prepared horseradish (optional, if you don't like horseradish you are in luck because this is still good without it), squeezed dry in a towel
1/4 cup Duke's mayonnaise, or your favorite brand, just not Miracle Whip
2 teaspoons red wine vinegar
2 teaspoons water
Kosher salt and fresh ground black pepper
Parsley sprigs and chives for garnish
Assorted crackers or hearty toasted bread

Place the salmon on a platter on which it sits comfortably. Not too big and not too small but, as as baby bear would say, just right. Leave some room for the sauce runoff, just don't let the platter be so big the salmon looks like a life raft in the Pacific Ocean.
Combine the rest of the ingredients, sans garnishes, and whisk until combined. Taste and adjust the seasoning.
If you are transporting the appetizer, don't sauce or garnish it till you get to your destination.
Let the salmon come to room temperature. Sauce it, garnish it, and serve.