Chop 75 g chocolates. Whip the cream until stiff, fold into the condensed milk with the chocolates. Rinse a box or ice cream mould (approx. 1 litre) cold, line with foil. Pour in the cream mixture, cover and let it freeze overnight.
Pour the cherries into a sieve and collect the juice in a pot. Bring juice to the boil. Stir starch with liqueur until smooth. Stir the starch into the boiling juice, let it simmer for about 1 minute while stirring. Stir in cherries and let cool down.
Halve the rest of the chocolates. Dip the ice cream mould briefly in hot water, turn it over and remove the foil. Cut the ice cream into slices. Serve with cherries and pralines. Decorate with mint and dust with icing sugar.