Creating Red White and Blue Cheesecake Bars is simple, and following these steps will guide you through the process:

1. Preheat Oven: Preheat your oven to 325°F (163°C).
2. Prepare Baking Dish: Line an 8×8 inch baking dish with parchment paper, leaving an overhang on two sides for easy removal.
3. Make the Crust: In a medium bowl, mix graham cracker crumbs, melted butter, and sugar until well combined. Press this mixture firmly into the bottom of the prepared baking dish.
4. Bake the Crust: Bake the crust in the preheated oven for 10 minutes. Remove and allow it to cool slightly.
5. Prepare the Filling: In a large mixing bowl, blend the softened cream cheese and sugar until smooth. Add in the vanilla extract and mix until combined.
6. Add Eggs: Incorporate the eggs, one at a time, mixing gently after each addition until the batter is smooth.
7. Pour Filling: Pour the cheesecake filling over the cooled crust, spreading evenly.
8. Bake: Return the dish to the oven and bake for 30 minutes, or until the center is set but slightly jiggly.
9. Cool: Allow the cheesecake to cool at room temperature, then refrigerate for at least 1 hour to firm up.
10. Add Toppings: Once chilled, arrange the chopped strawberries and blueberries on top of the cheesecake layer.
11. Cut and Serve: Lift the cheesecake out of the baking dish using the parchment paper overhang. Cut into squares and serve with a dollop of whipped cream, if desired.