Wash the potatoes and cook in boiling water for about 20 minutes. In the meantime mix crème fraîche and vodka. Season with salt and pepper. Wash the dill, dab dry and pluck flags from the stalks. Drain the potatoes, rinse and peel them and cut them in half lengthwise. Put the potato halves in paper cups and put a dash of crème fraîche on each. Garnish with lumpfish roe and dill