Break the chocolate into pieces and put them with the milk and the sugar in a bowl, and place the bowl in a water bath in a casserole with simmering water, and let the chocolate melt. When the chocolate are melted let it cool off. Then gently turn the light whipped cream in too the chocolate mixture and frees it in a metal container till it is half frozen then stir till it gets soft and put it back in the freezer, until it is served.
If you have the time stir the mixture more often in to the freezer prevent ice flakes.