In a small bowl, stir together mayonnaise, sour cream, chives, lemon zest, and salt. Cover and refrigerate for up to a day until ready to use.
Using a serrated bread knife in a gentle sawing motion, trim and discard crusts from bread slices to create 4 (3x2-inch) rectangles. Cut each bread rectangle into 2 (3x1-inch) rectangles.
Spread approximately 1 teaspoon mayonnaise mixture in an even layer onto each bread rectangle. Top each with 4 Pickled Cucumber slices and a smoked salmon slice.
Garnish with additional chives, if desired. Serve immediately.
Notes
*It’s easier to cut the salmon if it’s partially frozen.
Recipe by Southern Lady Magazine at https://southernladymagazine.com/browned-butter-sage-kugel-salmon-canapes/