Prep the cucumber base: Slice the English cucumbers into even, ½-inch thick rounds. Lay them flat on a paper towel, lightly dust with a pinch of fine sea salt, and let rest for 5 minutes. Gently blot the tops completely dry with a second paper towel to remove excess moisture.
Whip the yogurt: In a small mixing bowl, aggressively whisk the chilled Greek yogurt, grated ginger, coconut aminos, toasted sesame oil, and lemon juice for 60 seconds until light, aerated, and smooth.
Pipe the filling: Transfer the whipped yogurt to a piping bag fitted with a star tip (or use a small spoon). Pipe a generous dollop (about 1 teaspoon) onto the center of each dried cucumber round.
Layer the salmon: Take a small ribbon of the cold-smoked salmon, fold it gently into a rosette shape, and press it lightly into the whipped yogurt on each cucumber slice.
Garnish and serve: Arrange the bites on a chilled serving platter. Garnish each piece with toasted sesame seeds, a tiny sprig of fresh dill, and a single flake of sea salt. Serve immediately.