Melt semi sweet chocolate (or the chocolate bark) and spread in a pan or on
waxed paper. Cool.
Melt white chocolate and carefully spread on top of the chocolate.
Immediately sprinkle chopped peppermints on top.
Break in pieces when hardened and store in tin. If I'm giving a gift
sometimes I reverse the order of chocolate so there is some with chocolate
on the top, just for visual variety.
I make mine in a jelly roll pan and refrigerate to harden. I don't like the
peppermints too large or powdered, so I nit pick it to get just the perfect
sized pieces. I have been known to put what I don't use into vanilla ice
cream with some chopped chocolate.