In a large pot, cook potatoes with skins on in heavily salted boiling water until tender, approximately 15 minutes. Remove potatoes from pot, and peel them while still warm. Place potatoes in a large bowl and, using a fork, gently smash them, maintaining a fairly chunky consistency. Fold in minced shallots, lemon juice, olive oil, fleur de sel, and white pepper. Finish with parsley.