Heat the vinegar, sugar and a splash of water in a small saucepan
just long enough to dissolve the sugar
. Transfer to a small serving bowl and let cool.
the cucumber, then grate it on the large holes of a box grater
or in a food processor
using the shredding disk, or with a mandoline
. Place the cucumber in a sieve
and season with sea salt. Let drain
for 20 to 30 minutes.
Press the liquid from the cucumber, and then add the cucumber to the bowl with the vinegar mixture. Stir in the creme fraiche and season with white pepper. Adjust the salt and pepper to taste.