Prep the strawberries: Remove the stems by slicing off the tops. Use a small paring knife or a strawberry huller to scoop out a small cavity in the center.
Be gentle so the berry keeps its shape. Pat the hollowed berries dry with a paper towel to help the filling stick.
Soften the cream cheese: Make sure the cream cheese is at room temperature. This prevents lumps and makes a smoother filling.
Make the cheesecake filling: In a mixing bowl, beat cream cheese with the powdered sweetener, lemon juice, lemon zest, vanilla, and a pinch of salt until fluffy and smooth, about 1–2 minutes.
Adjust texture: Add heavy cream, 1 tablespoon at a time, and beat until the filling is silky and pipeable.
You’re aiming for a thick mousse that holds peaks but isn’t stiff.
Taste and tweak: Add a touch more sweetener or lemon juice if needed. The flavor should be bright with a gentle tang.
Fill the berries: Transfer the filling to a piping bag fitted with a star or round tip, or use a zip-top bag with a small corner snipped off. Pipe the filling into each strawberry cavity, slightly mounding the top.
Finish with garnish: Sprinkle with a little extra lemon zest.
Add chopped nuts or coconut if you like a bit of crunch.
Chill briefly: Refrigerate for 20–30 minutes to set the filling and firm up the berries. Serve chilled.