In a food processor combine cream cheese, capers, red onion, lemon zest and pepper, and process until smooth. Set aside.
Cut ficelles in half length-wise.
Spread bottom half of baguette with cream cheese mixture
Layer slices of smoked salmon and top with top half of baguette
Place the bunch of chives in a bowl filled with boiling water
Cut baguette into 12 slices depending on desired sandwich size.
Tie with chive to hold together.