Let’s dive into the process of creating these luscious bars. Make sure to set aside some uninterrupted time, so you can enjoy every step of the baking journey.

1. Preheat your oven to 325°F (165°C) and line a 9×9-inch baking pan with parchment paper, leaving some overhang for easy removal.
2. In a medium bowl, combine graham cracker crumbs, 1/4 cup granulated sugar, and melted butter. Mix until the crumbs are evenly coated and have the texture of wet sand.
3. Press the crumb mixture firmly into the bottom of the prepared pan to form a crust. Use the back of a measuring cup to press it down evenly. Bake for 8-10 minutes, then let cool.
4. In a large mixing bowl, beat the softened cream cheese and 3/4 cup granulated sugar until smooth and creamy. This should take about 2-3 minutes.
5. Add in the eggs, one at a time, mixing well after each addition. Stir in the lemon juice, lemon zest, and vanilla extract until fully incorporated.
6. Pour the cheesecake mixture over the cooled crust, spreading it evenly with a spatula.
7. In a small saucepan over low heat, warm the strawberry jam until it’s pourable. Remove from heat and gently fold in the diced strawberries.
8. Spoon the strawberry mixture over the cheesecake layer, using a toothpick or knife to swirl it gently, creating a marbled effect.
9. Bake the bars for 35-40 minutes, or until the center is just set and the edges are slightly golden. Let them cool to room temperature, then refrigerate for at least 2 hours to firm up.
10. Once chilled, use the parchment paper to lift the bars from the pan. Cut into squares and serve.

A little tip from my kitchen to yours: When swirling the strawberry mixture, don’t overdo it. A few gentle swirls will create a beautiful marbled look without blending the layers too much.