2) Drain the potatoes and return them to the saucepan to dry completely. Allow to cool enough to handle.
3) Flatten each potato by pressing down with the palm of your hand or by using the flat side of a meat pounder.
4) Serve the potatoes on a large platter with a spoonful of creme fraiche on top. Sprinkle with lime zest and juice and season, to taste, with salt and pepper.