Pop a serving dish in the freezer for about 10 minutes to chill it.
Using a microplane grater, zest the limes first and set aside zest.
Cut the limes in half and juice the limes.
In a medium bowl, combine the lime juice, olive oil, honey, and water. Whisk until well combined and emulsified.
Remove the serving dish from the freezer and arrange the smoked salmon on the dish in a single layer.
Sprinkle the lime zest over the top of the salmon.
Arrange the sliced cucumber, serrano pepper, red onion slices, and cilantro leaves over the top of the salmon.
Right before serving, give the lime sauce a good stir and then drizzle over the top of the salmon. Serve immediately or within 1 hour of preparing.