In a kettle, cover potatoes with cold water. Bring to a boil, cover, turn off flame and allow to sit about 45 minutes to one hour until tender. Drain and allow to cool.
In a small bowl, whisk creme fraiche, lime juice and zest, salt, honey,and chives. Slowly add olive oil, blending until emulsified. Taste and adjust seasoning.
To assemble, take a potato, cut a sliver off the bottom so it will sit comfortably, and another sliver off the top. Spread or brush a small amount of dressing on top cut side. Take a thin slice of salmon, cut in half, twirl into a small roll and set atop potato. Drizzle a little dressing over and garnish with more chives. Repeat for each potato. Set on a serving platter.