01 - In a bowl, combine crushed graham crackers or digestive biscuits with melted butter. Stir until the crumb mixture is evenly moistened.
02 - Distribute the crumb mixture evenly among 6 individual serving glasses or ramekins. Press gently to form a compact, level base.
03 - Beat softened cream cheese with powdered sugar, vanilla extract, and lemon zest (if using) in a mixing bowl until smooth and creamy.
04 - In a separate bowl, whip the cold heavy cream with an electric mixer or whisk until stiff peaks form.
05 - Gently fold the whipped cream into the cream cheese mixture until fully incorporated. Spoon or pipe the filling evenly over the biscuit base in each serving glass.
06 - In a small bowl, toss mixed fresh berries with granulated sugar and lemon juice. Allow to macerate for 10–15 minutes until juices develop.
07 - Spoon the berry mixture with its juices over the cheesecake filling in each serving vessel.
08 - Cover and refrigerate the assembled cheesecakes for a minimum of 3 hours, or overnight, until thoroughly set. Serve well-chilled.