Line a baking tray with a sheet of parchment paper.
Melt the black chocolate over a double boiler until totally liquid.
Pour the chocolate onto the baking tray and spread it out into a thin layer.
Then sprinkle the pistachios and cranberries on top of the chocolate and press it them in lightly.
Refrigerate the bark for 20-30 minutes to let it harden.
Break the bark into uneven pieces.
Keep refrigerated until ready to serve/gift.
For the milk chocolate barks, proceed the same way as for the dark chocolate ones. Chop the walnuts and banana chips before sprinkling them on the chocolate layer.
Enjoy!!!