01 - Line the base of a 9-inch springform pan with parchment paper.
02 - Combine crushed graham crackers or digestive biscuits with melted butter in a bowl until evenly moistened. Press mixture firmly into the prepared pan to form an even layer. Chill in the refrigerator while assembling the filling.
03 - Place chopped white chocolate in a heatproof bowl over a pot of gently simmering water. Stir until melted and smooth. Remove from heat and let cool slightly.
04 - In a large mixing bowl, beat cream cheese and granulated sugar until smooth and creamy. Blend in vanilla extract and lemon juice until well combined.
05 - In a separate cold bowl, whip heavy cream with a mixer until medium-stiff peaks form.
06 - Fold cooled melted white chocolate into the cream cheese mixture. Gently incorporate whipped cream, folding until just blended for an airy texture.
07 - Spread the filling evenly over the chilled crust. Smooth the surface, cover, and refrigerate for at least 6 hours, or preferably overnight, until fully set.
08 - In a saucepan, combine cranberries, granulated sugar, and water. Cook over medium heat, stirring occasionally, until cranberries burst and mixture thickens, about 8 minutes. Stir in cornstarch slurry and cook for 1–2 minutes until glossy and slightly thickened. Allow topping to cool completely.
09 - Before serving, spread the cooled cranberry topping over the set cheesecake. Remove from pan, slice, and present as desired.