Mix graham cracker crumbs, melted butter, granulated sugar, and salt in a small bowl until it looks like wet sand. Press this mixture firmly into the bottom of a 9-inch springform pan. I use the bottom of a measuring cup to get it totally flat and even.
Pop the crust in the freezer for 10 minutes while you make the filling—this keeps it from getting soggy. Honestly, don't skip this step; it makes a real difference in texture.
Beat softened cream cheese and powdered sugar together until you've got zero lumps. Scrape down the sides of the bowl a few times. Add vanilla extract and mix until it's silky smooth.
In a separate bowl, whip heavy whipping cream to stiff peaks using an electric mixer. This usually takes about 2-3 minutes on high speed. When you lift the beaters, the cream should stand up in little mountains.
Fold the whipped cream into the cream cheese mixture gently using a spatula. Do this carefully—you're trying to keep those airy peaks intact. Combine strawberry jam and lemon juice in a small bowl, then fold that into the filling for that beautiful strawberry flavor.
Pour the creamy filling onto your chilled crust and smooth the top. Refrigerate this no bake strawberry cheesecake cozy for at least 4 hours before serving—overnight is even better.
Top with fresh diced strawberries right before serving. These stay bright and beautiful on top rather than getting buried in the filling.