Creating Raspberry Pistachio Cheesecake Bars is simple if you follow these steps:

1. Preheat the Oven: Preheat your oven to 325°F (162°C).
2. Prepare the Crust: In a mixing bowl, combine the graham cracker crumbs, melted butter, and sugar. Mix well until it resembles wet sand.
3. Press the Crust: Firmly press the crumb mixture into the bottom of a greased 9×9-inch baking pan. Create an even layer across the base.
4. Bake the Crust: Place in the preheated oven and bake for 10 minutes. Allow it to cool slightly while preparing the filling.
5. Make the Cheesecake Filling: In a large bowl, beat the softened cream cheese with sugar until smooth. Add eggs one at a time, mixing after each addition.
6. Add Flavor: Mix in the vanilla extract. Gently fold in the fresh raspberries until evenly distributed in the mixture.
7. Pour Filling: Pour the cheesecake filling over the cooled crust, smoothing the top with a spatula.
8. Bake the Cheesecake: Return to the oven and bake for 30-35 minutes, or until the center is set.
9. Cool Down: Remove from the oven and let it cool to room temperature. Then, refrigerate it for at least 30 minutes for better slicing.
10. Prepare the Topping: Just before serving, sprinkle the chopped pistachios evenly over the chilled cheesecake.
11. Drizzle Raspberry Sauce: Add raspberry sauce over the top. Optionally, decorate with reserved raspberries for an extra touch.
12. Slice and Serve: Cut into squares for serving, making sure to have a bit of crust, filling, and topping in each piece.