Preparation

• Preheat oven to 325 degrees.
  Butter a 4-cup soufflé mold. Set aside.
  Drain the prunes and puree in a food processor. Beat the egg whites with the cream of tartar to a firm peak. Gradually add the sugar. Fold the egg whites into the pureed prunes together with the lemon rind and nuts.
  Spoon the mixture into the prepared soufflé mold. Bake for 20 to 25 minutes. The prune whip will look like a souffle after it is baked. Serve hot or cold. If served cold the prune whip will settle in the dish.