Prepare the salmon by finely dicing it with a sharp knife.
In a bowl, combine salmon with shallots, olive oil, lemon juice, mustard, parsley, chives, capers, and Tabasco. Mix gently. Refrigerate for 15 minutes.
Toast sourdough until golden. Spread with cream cheese, layer tomatoes, and top generously with salmon tartare.
Serve immediately and enjoy your café-worthy appetizer.
