Step 1: Crafting the Perfect Graham Cracker Crust

1. Preheat Your Oven: Begin by preheating your oven to 350°F (175°C). Prepare an 11×7-inch baking dish by spraying it with non-stick cooking spray.
2. Mix the Crust Ingredients: In a medium mixing bowl, combine 1 ½ cups of graham cracker crumbs, ¼ cup of granulated sugar, and 6 tablespoons of melted butter. Stir until the mixture resembles wet sand and clumps together when pressed.
3. Press and Bake: Pour the graham cracker mixture into the prepared baking dish. Use the back of a measuring cup to press the mixture down evenly to form a crust. Bake in the preheated oven for 10-15 minutes, or until the crust is golden brown. Remove from the oven and let it cool while you prepare the cheesecake layer.

Step 2: Whipping Up the Cheesecake Layer

1. Prepare the Cheesecake Mixture: In a large mixing bowl, beat 16 ounces of softened cream cheese until smooth and fluffy. Add 2 large eggs, ⅓ cup of granulated sugar, 1 teaspoon of vanilla extract, and ¼ teaspoon of salt. Continue beating until the mixture is completely smooth and creamy.
2. Layer the Cheesecake: Pour the cheesecake mixture over the cooled graham cracker crust, spreading it evenly with a spatula.

Step 3: The Secret to a Delicious Blueberry Sauce

1. Cook the Blueberry Sauce: In a medium-sized saucepan, combine 1 cup of the fresh blueberries, ⅛ cup of granulated sugar, 2 tablespoons of water, 1 tablespoon of lemon juice, and 1 tablespoon of cornstarch. Stir the ingredients together and cook over medium heat, stirring occasionally, until the blueberries start to burst and the mixture thickens into a sauce (about 5-7 minutes).
2. Add Remaining Blueberries: Remove from heat and add the remaining ¼ cup of blueberries. Stir to combine.
3. Swirl the Sauce: Spoon the blueberry sauce over the cheesecake layer. Use a toothpick or knife to swirl the sauce gently into the cheesecake mixture, creating a marbled effect. Sprinkle the remaining ¼ cup of fresh blueberries over the top.

Step 4: Crunchy Brown Sugar Pecan Topping

1. Prepare the Pecan Topping: In a small bowl, mix together ¾ cup of brown sugar, ¼ cup of all-purpose flour, ¾ cup of chopped pecans, and ¼ cup of melted butter. Stir until the ingredients are well combined and the mixture forms a crumbly texture.
2. Add the Topping: Evenly spoon the brown sugar pecan topping over the cheesecake and blueberry layers.

Step 5: Baking the Cheesecake Bars to Perfection

1. Bake the Bars: Place the baking dish back in the oven and bake for 35-40 minutes, or until the pecan topping is golden brown and the cheesecake layer is set.
2. Cool and Chill: Remove from the oven and allow the bars to cool to room temperature. Then refrigerate for at least 2 hours, or until fully chilled. This will help the bars set properly and enhance their flavor.