Soak gelatine in cold water. Drain pineapple and cranberries well. Beat the eggs, sugar, honey and lemon peel in a hot water bath until creamy. Squeeze the gelatine vigorously and dissolve at lukewarm water.
Add rum and gelatine and stir into the egg foam mixture. Chill until the mixture begins to set. In the meantime whip cream until stiff. Then carefully fold into the cream. Serve the cream garnished with pineapple slices and cranberries.