Working with 10 slices of bread at a time, spread each with about 1 heaping teaspoonful of pareve cream cheese. Top each smear with 1 slice of salmon, 2 to 3 slices of red onion and 1 small sprig of dill. Top with remaining 10 slices of rye and press lightly to secure.
Can be made up to 2 hours in advance if wrapped tightly in plastic wrap and refrigerated.