1.
Boil the potatoes in salted water until they are 80% done. Peel them and let them cool. (This can be done the day before.)
2.
Refrigerate the potatoes for at least 40 minutes or overnight.
3.
Melt the sugar over low heat in a large, heavy saucepan. Do not touch the sugar until you see that the caramel is almost completely melted, then you can stir slowly with the help of a wooden spoon or a silicone spatula!
4.
When the caramel has melted and browned completely, add the butter, stir and let the mixture boil until it becomes a caramel sauce. Add potatoes and gently stir them into the caramel. Let them simmer over low heat for 15-25 minutes, flipping them often, until they are coated with caramel on all sides.
5.
When the caramelized potatoes are ready, sprinkle some fleur de sel on top of them and enjoy!
