Follow these steps to create your delicious Peaches and Cream Cheesecake Bars:

1. Preheat the oven to 325°F (160°C) and line an 8-inch square baking dish with parchment paper, allowing some overhang for easy removal later.
2. Prepare the crust: In a medium bowl, mix graham cracker crumbs, granulated sugar, and melted butter until well combined. Press the mixture evenly into the bottom of the lined baking dish to form a crust.
3. Bake the crust: Place the crust in the preheated oven and bake for about 10 minutes. Remove from the oven and set aside to cool slightly.
4. Make the filling: In a large bowl, beat the softened cream cheese with granulated sugar and vanilla extract until smooth and creamy. Add eggs one at a time, mixing well after each addition.
5. Pour the filling: Pour the cream cheese mixture over the cooled crust, smoothing the top with a spatula.
6. Bake the filling: Return the baking dish to the oven and bake for 25-30 minutes, or until the edges are set but the center is still slightly jiggly.
7. Prepare the peach topping: While the cheesecake is baking, toss the sliced peaches with lemon juice and sugar in a bowl. Let them sit for about 10 minutes to release their juices.
8. Add the topping: After the cheesecake has finished baking, remove it from the oven. Gently arrange the peach slices on top of the warm cheesecake filling.
9. Bake again: Return the dish to the oven for an additional 10 minutes. The peaches should become tender, and the edges of the cheesecake will firm up.
10. Cool completely: Remove the dessert from the oven and let it cool at room temperature for about 30 minutes. Then, refrigerate for at least 2 hours until fully chilled.
11. Slice into bars: Once chilled, use the parchment overhang to lift the cheesecake out of the dish. Slice into bars and serve!