Prepare the Pecan Crust: In a medium bowl, combine the crushed graham crackers, pecans, melted butter, and sugar. Stir until the mixture looks like wet sand. Press it firmly into the bottom of a 9×13-inch baking dish using the back of a spoon or a flat measuring cup. For a no-bake version, place the crust in the refrigerator for 20–30 minutes to firm up. For extra crispness, bake at 350°F (177°C) for 10 minutes, then cool completely.
Make the Cheesecake Layer: In a large mixing bowl, beat the cream cheese with an electric mixer until smooth and creamy (no lumps). Add the powdered sugar, vanilla extract, and lemon juice. Mix until light and fluffy. Gently fold in 1 ½ cups whipped topping until well incorporated and smooth. Spread the cheesecake mixture evenly over the chilled crust using a spatula.
Add the Cherry Layer: Carefully spoon the cherry pie filling over the cheesecake layer. Spread evenly using a spatula, making sure not to mix the layers. If using almond extract, stir it into the cherry filling before spreading for enhanced cherry flavor.
Add the Final Whipped Topping Layer: Spread the remaining 2 cups of whipped topping evenly over the cherry layer. Use an offset spatula to smooth the top for a clean, elegant finish.
Garnish and Chill: Sprinkle the top with chopped toasted pecans for crunch and decoration. Optionally, add a few fresh cherries for extra flair. Cover the dish with plastic wrap and refrigerate for at least 4 hours, or overnight for best results. The chilling time allows the layers to set beautifully and the flavors to blend.