01 - Preheat oven to 350°F. Grease a 9x9-inch baking dish. In a bowl, combine flour, melted butter, pecans, sugar, and salt. Press mixture into the bottom of the prepared dish.
02 - Bake crust for 18–20 minutes, until lightly golden. Cool completely before proceeding.
03 - Beat cream cheese and powdered sugar until smooth. Add vanilla. In a separate bowl, whip heavy cream to stiff peaks. Gently fold whipped cream into the cream cheese mixture until fully combined.
04 - Spread the cream cheese filling evenly over the cooled crust.
05 - Combine blueberries, sugar, cornstarch, lemon juice, water, and lemon zest in a saucepan. Cook over medium heat, stirring frequently, until mixture thickens and becomes glossy (about 6–8 minutes). Remove from heat and let cool to room temperature.
06 - Carefully spread the blueberry topping over the cream cheese layer. Cover and refrigerate for at least 1 hour before serving for best texture and flavor.