Prep your pan. Use a 9-inch tart pan with a removable bottom or a springform pan lined with parchment.
Lightly grease the sides to make unmolding easy.
Make the crust. Crush the cookies into fine crumbs in a food processor or a zip-top bag with a rolling pin. Stir in sugar and salt, then pour in melted butter. Mix until the crumbs feel like damp sand.
Press and chill. Firmly press the crumb mixture into the bottom and up the sides of your pan.
Use the bottom of a measuring cup to compress evenly. Chill for 20 minutes to help it set.
Bloom the gelatin. Sprinkle gelatin over 2 tablespoons of cold water in a small bowl. Let it sit for 5 minutes until it looks spongy.
Warm the gelatin. Microwave the bloomed gelatin for 8–10 seconds until just melted and clear.
Let it cool for 2 minutes—still liquid, not hot.
Whip the cream. In a cold bowl, whip heavy cream to soft peaks. Set aside in the fridge while you make the base.
Mix the cream base. Beat cream cheese until smooth and fluffy. Add powdered sugar, salt, vanilla, and lemon zest.
Mix until creamy, then beat in the sour cream or yogurt until silky.
Stabilize the filling. With the mixer running on low, slowly stream in the melted gelatin. Mix just to combine.
Fold in whipped cream. Gently fold the whipped cream into the cream cheese mixture in two additions. Stop as soon as it’s smooth and airy.
Fill and level. Pour the filling into the chilled crust and smooth the top with an offset spatula.
Tap the pan lightly on the counter to release air bubbles.
Chill to set. Refrigerate for at least 4 hours, or until the center feels set and jiggly like firm custard. Overnight is ideal for clean slices.
Prep the strawberries. Shortly before serving, hull and slice strawberries. For a polished look, keep some whole and halve others.
Pat them dry to avoid extra moisture.
Add the fruit. Arrange strawberries over the chilled tart in circles or a loose pile—whatever feels natural. If using jam, warm it with a teaspoon of water and brush lightly over the berries for shine.
Unmold and serve. Run a thin knife around the rim and gently release the tart from the pan. Slice with a hot, clean knife.
Serve chilled.