Line a loaf tin with cling wrap and place in the freezer to chill.
In a bowl whisk the vanilla essence and condensed milk together.
Beat the cream into soft peaks using an electric mixer.
Add the condensed milk with the vanilla essence and the amasi to the whipped cream and continue to mix till everything has been well incorporated.
Once the ice-cream mixture is well mixed remove from the mixture and fold in the crushed biscuits.
Pour the mixture into the chilled loaf tin and place in the freezer for 3 - 4 hours or until the ice-cream has set.
When set, turn out, slice or serve as needed.