Put the crushed ginger biscuits and melted butter in a small bowl and mix until well combined. Divide the mixture between four glasses or large ramekins and press down lightly. Put the glasses in the fridge while you prepare the filling.
Place the cream cheese in a mixing bowl and whisk to soften. Add the condensed milk and whisk until smooth. Add the lemon juice and mix again until everything is combined.
Divide the filling between the four glasses. Put them in the fridge until set. Before serving top each cheesecake with a heaped teaspoon of lemon curd and some fresh berries.