Melt the chocolate.
Heat the cream, remove the pan from the heat, add the chocolate, melt.
Make ice cream
Mix the eggs and sugar together well in a bowl. Add chocolate while stirring, return everything to the pan and, over a medium heat, bring to just below boiling point, stirring constantly. Remove the pan from the hob, continue to stir for about another 2 mins. Pour the cream through a sieve into a stainless steel bowl, leave to cool.
Cover and freeze the mixture for approx. 3 hrs., stirring 3 times. Stir in the chocolate and freeze for approx. 1 hour.
shape the ice cream into balls and sprinkle with pretzel crumbs.