Step 1: Prepare the Graham Cracker Crust

1. Preheat the oven to 350°F (175°C). Prepare your 11×7 baking dish by spraying it with non-stick cooking spray.
2. In a medium mixing bowl, combine 1 ½ cups of graham cracker crumbs, 6 tablespoons of melted butter, and ¼ cup of granulated sugar. Mix until the texture resembles wet sand and the crumbs are evenly coated.
3. Pour the mixture into the prepared baking dish and press it firmly with the back of a measuring cup or your hands to create an even crust.
4. Bake the crust in the preheated oven for 10-15 minutes, or until it turns a light golden brown. Remove from the oven and let it cool while you prepare the cheesecake layer.

Tips for a Perfect Crust: Make sure to press the crust mixture firmly and evenly to avoid any gaps or unevenness. This helps create a sturdy base for the cheesecake.

Step 2: Create the Cheesecake Layer

1. In a large mixing bowl, beat 16 ounces of softened cream cheese using a hand or stand mixer until smooth and fluffy.
2. 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 fully combined and smooth.
3. Pour the cream cheese mixture over the cooled graham cracker crust and spread it out evenly with a spatula.

Common Mistakes to Avoid: Do not overbeat the cheesecake mixture to prevent too much air from getting into it, which can cause cracks while baking.

Step 3: Make the Blueberry Sauce

1. In a medium-sized saucepan, combine 1 cup of blueberries, ⅛ cup of granulated sugar, 2 tablespoons of water, 1 tablespoon of lemon juice, and 1 tablespoon of cornstarch. Stir well to dissolve the cornstarch.
2. Cook over medium heat, stirring occasionally, until the blueberries start to burst and the mixture thickens into a sauce, about 5-7 minutes.
3. Remove from heat and add the remaining ¼ cup of blueberries. Stir to combine.

How to Make the Perfect Blueberry Swirl: Spoon the blueberry sauce over the cheesecake layer. Use a toothpick or knife to gently swirl the sauce into the cheesecake mixture, creating a marbled effect.

Step 4: Add the Brown Sugar Pecan Topping

1. 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 until well combined.
2. Evenly sprinkle the topping over the blueberry cheesecake layer, ensuring full coverage.

Getting the Topping Just Right: Make sure the topping is evenly distributed for a consistent crunch and sweetness in every bite.

Step 5: Baking and Finishing Touches

1. Place the baking dish in the preheated oven and bake for 35-40 minutes, or until the topping is golden brown and the cheesecake layer is set.
2. Once done, remove from the oven and allow the cheesecake bars to cool to room temperature in the baking dish. Then, refrigerate for at least 2 hours to let the bars fully set before slicing.

How to Know When Your Bars Are Ready: The cheesecake should be firm to the touch and the topping should be golden brown. The center should slightly jiggle but not be liquid.