Combine graham cracker crumbs and sugar in a medium bowl.
Add melted butter and mix until the mixture looks like wet sand.
Press the crust firmly into the bottom of a 9x9-inch baking dish and refrigerate.
Beat softened cream cheese with an electric mixer until smooth.
Add powdered sugar and vanilla, continuing to beat until incorporated.
Whip heavy cream in a separate bowl until stiff peaks form.
Gently fold the whipped cream into the cream cheese mixture until smooth.
Spread the cheesecake filling evenly over the chilled crust.
In a small saucepan, combine strawberries, sugar, and lemon juice.
Heat over medium, stirring occasionally, until syrupy, about 5-7 minutes.
Remove from heat and let the topping cool to room temperature.
Spoon the cooled strawberry topping evenly over the cheesecake layer.
Refrigerate for at least 4 hours or overnight to set.
Cut into bars and serve chilled.